Dyno Day revisited 1 week later!

[boost_boy]

Took the old sentra back to the rollers yesterday and guess what, same 'ol crapola with A/F ratio being a little too high. I installed the walboro 255 lph and it was no better than the 300zx TT pump. After about 4 pulls, I decided to crank up the pressure on the nismo F/P regulator to 80 psi because the whole situation was starting to piss me off. I did another pull and A/F ratio got down to desired levels, (changed my damn pump for nothing) so I decided enough was enough for the 'ol nismo f/p regulator. Luckily I came prepared with an extra fuel rail with regulator because in my honest mechanical mind, I figured the regulator was suspect, even though one of the dyno operators said it was good to go.

It took me about 15 minutes to install the stock regulator and when I did a pull, the results were much more realistic, but still a bit lean at about 13.7:1. Added about 2% fuel across the board and voila, it's showtime. With timing retarded 2 degrees from normal driving settings for safety purposes, @12 psi the car put down 258whp and 227.9 lb/ft of torque with an A/F ratio so perfectly stable, it resembles a dead person's EKG . Keep in mind that this is with an internally stock CA18DET with some big injectors, a T3/T04E stage III .60 A/R and a .48 back housing, a nice size intercooler, a computer system that I get to program.

I cranked the boost up to 17 psi and the car put out 292whp with the timing still snatched back. Somewhere along the way with the car running hot @ 194 degees fahrenheit because of a busted heater hose, timing moved up 2 degrees, and with boost jacked-up to 20psi, the car put down 332whp with 277.3 lb/ft of torque. I tried to go some more, but the boost controller and the car's temperature would not permit it.

All in all, between two saturdays, a total of 55 pulls on the rollers, a total of $360 for a total 6 hours, I got plenty accomplished. Though I've always known this beccause I've been here before, the little CA18DET is a very durable engine that can withstand the abuse you throw at it, granted you have a capable fuel system that can accomodate your driving habits. And to those who read this and may have heard the myth that the CA18DET's headgasket can only take 15psi of boost, you have heard wrong. I've gotten as high as 22psi on this engine with multiple pulls, and being a used engine to boot, it has just down-played that myth. I've gone as high as 25psi on my old engine and it held together just fine. I'll post pics one of these days as I don't have a scanner, but I do have a digital camera.

So in closing, people are very enthused with the durability of the CA and most say they didn't know that this engine can take that much abuse because they were led to believe that the Sr20 is better and stronger. I agree to one thing about the SR, there is no replacement for displacement, but the difference in design between the two is like comparing a honda civic to that of a Rolls Bentley. {Boost safely }

Dee

[8ggalant]

dee lemme get yer email...i got a proposition for ya

btt...

NICE NUMBERS

[RMiller]

Nice.

[DriftinNC]

good pulls... whats up with the nismo FPR?

[float_6969]

I love it Dee. I was giggling like a school girl. I kinda have a vendetta against my girlfriends older brother. When she told him that I was planning on having 250-275 out of this motor, he said it wasn't possible and that it wouldn't hold up. Mine is completely built up now and the only limiting factor to my build is my turbo. I'm not sure that I can get those kind of numbers out of my modified S14, but we'll see. I'm half temped to put together a T3/T4 setup just to see what it'll take....

[originalsin]

awesome numbers, i had faith in the motor the hole time, but what injectors were you using and wat type of engine management?

[droopy_map]

Splendid figures man!!!!! Really would like to see some pics whenever you get the chance though. Great achievement though, just imagine if you go internal on that f@#$er........ AH!!!!!!!!!! Refreshing!!!!!!!!!!!!!!! This is definitely the right place to be........

[pulsar gtr]

Congrats Dee, these are some awesome numbers, beside the HP, I was very impressed with the torque.At What RPM did the hp peak, also, what cams were you using.

25psi on stock headgasket, what else people need for a poof? awesome

Job well done dude.

RafiPULSAR GTR

[Nismo1182]

Good work Dee!

As far as the stock head gasket goes, did you torque or re torque the stock head bolts down a bit more?

[rico05]

DEE THE TUNINATOR

Very impressive. Makes me think I don't need to play HL2 better, but buy my baby an SDS. You're a haas man. Good job on the car.

[r34 gtr]

that torque figure at 20psi is pretty damn nice. ill bet you have all kinds of traction issues with over 275lb/ft in a 2200lb (ish) fwd car. i hope mine can pull off at 18psi what yours did at 12. your engine is like what all other ca's should hope to aspire to, anything that can take that much of a beating and perform like it does is truly something special. your sentra is a friggin' hoss.

ryan, by "girlfriend" do you mean your right hand? and by "girlfriend's brother" do you mean a figment of your imagination? im not even going to try and make fun of your "giggling like a school girl" statement because it would just be too damn easy. im also appauled that you can think of buying a t3/t4 kit for your car after that flywheel and god knows what else. you should totally do it though. spite the hell out of that bastard, throw on kev's sc61 and manifold and throw down some stupidly high horsepower figure.

- tim

[boost_boy]

Congrats Dee, these are some awesome numbers, beside the HP, I was very impressed with the torque.At What RPM did the hp peak, also, what cams were you using.

25psi on stock headgasket, what else people need for a poof? awesome

Job well done dude.

RafiPULSAR GTR

Hey Rafi, the car made 332.2whp@6600rpm and max torque was 277.3 lb/ft@5800rpm.

Dee

[boost_boy]

good pulls... whats up with the nismo FPR?

What do you want to know? It's in my tool bag as we speak.

Dee

[boost_boy]

awesome numbers, i had faith in the motor the hole time, but what injectors were you using and wat type of engine management?

I'm using 72 lb/hr injectors and an SDS engine management system.

Dee

[boost_boy]

Good work Dee!

As far as the stock head gasket goes, did you torque or re torque the stock head bolts down a bit more?

Engine is internally stock. Used to be an automatic RWD engine that I converted to my FWD sentra, added my injectors, turbo, and computer and let it ride.

Dee

[boost_boy]

DEE THE TUNINATOR

Very impressive. Makes me think I don't need to play HL2 better, but buy my baby an SDS. You're a haas man. Good job on the car.

You're a sick puppy , but I do thank you for the praise. Somebody has to do it; to set the trend a bit. Information and communication is key to people finding their successes with their individual set-ups.

Dee

[boost_boy]

that torque figure at 20psi is pretty damn nice. ill bet you have all kinds of traction issues with over 275lb/ft in a 2200lb (ish) fwd car. i hope mine can pull off at 18psi what yours did at 12. your engine is like what all other ca's should hope to aspire to, anything that can take that much of a beating and perform like it does is truly something special. your sentra is a friggin' hoss.

ryan, by "girlfriend" do you mean your right hand? and by "girlfriend's brother" do you mean a figment of your imagination? im not even going to try and make fun of your "giggling like a school girl" statement because it would just be too damn easy. im also appauled that you can think of buying a t3/t4 kit for your car after that flywheel and god knows what else. you should totally do it though. spite the hell out of that bastard, throw on kev's sc61 and manifold and throw down some stupidly high horsepower figure.

- tim

Traction problems (hah), I had to take off the drag radials because they smoked a bit on the rollers. But when I put the street tires back on, those tires just spin when I try and launch the car and it sucks. But now the car will just sit here, all washed-up and pretty waiting for a final highway tuning to get the boost controller to allow me to tune till 30 psi and then on to the track hopefully next week.

Dee

[Vetal]

Engine is internally stock. Used to be an automatic RWD engine that I converted to my FWD sentra, added my injectors, turbo, and computer and let it ride.

Dee

Super Dee, I'm often in a very good mood after reading your posts

[pulsar gtr]

That is an awesome rpm range for such a turbo, 6600rpm is very respectable. I was expecting you to have this power at roughly 7500rpm.That turbo must of spooled up at around 2500rpm.Are you using the T03/T04 Trubo?

Dee, what are the specs on your cams dude? Are they stock cams or some aftermarket, specs please.

RafiPULSAR GTR
Modified by pulsar gtr at 3:30 PM 1/31/2005

[sdtouge]

192 degrees is hot? my ka would go up to 230 with a koyo radiator and electric fans?

how do you keep your temps so low? i would love my temps to be "hot" at 192, what do you have for cooling? anything special?

[float_6969]

that torque figure at 20psi is pretty damn nice. ill bet you have all kinds of traction issues with over 275lb/ft in a 2200lb (ish) fwd car. i hope mine can pull off at 18psi what yours did at 12. your engine is like what all other ca's should hope to aspire to, anything that can take that much of a beating and perform like it does is truly something special. your sentra is a friggin' hoss.

ryan, by "girlfriend" do you mean your right hand? and by "girlfriend's brother" do you mean a figment of your imagination? im not even going to try and make fun of your "giggling like a school girl" statement because it would just be too damn easy. im also appauled that you can think of buying a t3/t4 kit for your car after that flywheel and god knows what else. you should totally do it though. spite the hell out of that bastard, throw on kev's sc61 and manifold and throw down some stupidly high horsepower figure.

- tim

I'll bet my girlfriend is hotter than your boyfriend! As for the power output, I know the motor will take it. I'd like to do it with the S14 T28, but we'll see. If it won't, then I just may fab up a T3/T4 setup real quick "just for spite". Hehehe

[djmace]

deng thats great!!! awesome..now how long it will last is the question =9

[boost_boy]

That is an awesome rpm range for such a turbo, 6600rpm is very respectable. I was expecting you to have this power at roughly 7500rpm.That turbo must of spooled up at around 2500rpm.Are you using the T03/T04 Trubo?

Dee, what are the specs on your cams dude? Are they stock cams or some aftermarket, specs please.

RafiPULSAR GTR

Modified by pulsar gtr at 3:30 PM 1/31/2005

Rafi, this engine is bone-@$$ stock. I mean the only thing I changed on it was the water pump and I even put the old timing belt that came with the engine back on it because of its condition. The hybrid turbo I'm using seems to come on to boost around 3000rpm and reach full boost by 3800rpm and pulls till I hit the 8750rpm rev limit I've set my ecu at. Probably has something to do with the type of manifold I have now which costed me nearly a grand. I wanted the best, so I went to the best and had to pay his price.

Dee

[boost_boy]

deng thats great!!! awesome..now how long it will last is the question =9

I've done this before and the engine lasted nearly 3 years and I had just decided it was time to tear it down and rebuild.

Dee

[sdtouge]

how do you kep your temps so cold? you said it was running hot at 192, thats amazing, any secrets for us noob's? i would love to have my engine stay at 192, at the track when my ka-e worked normal it would chill inbetween 200 and 230. now with a blown headgasket and warped head daily driving around 215ish. it sucks.

cliff notes: how do you keep your engine so cold?

[ca18detizzle]

yeh.. i hate where i live. no one in WA has or even wants a CA.. I think there are only like 4 people with CA motors up here.. No tuners, no one. No help either!! this is the only place I can get info!! hopefully I'll be the boostboy of the NW... ( hahahahha yeh right )

good work..

[Turbogixxer]

Took the old sentra back to the rollers yesterday and guess what, same 'ol crapola with A/F ratio being a little too high. I installed the walboro 255 lph and it was no better than the 300zx TT pump. After about 4 pulls, I decided to crank up the pressure on the nismo F/P regulator to 80 psi because the whole situation was starting to piss me off. I did another pull and A/F ratio got down to desired levels, (changed my damn pump for nothing) so I decided enough was enough for the 'ol nismo f/p regulator. Luckily I came prepared with an extra fuel rail with regulator because in my honest mechanical mind, I figured the regulator was suspect, even though one of the dyno operators said it was good to go.

:P

192 degrees is hot?

Generally when tuning a car you want the temp around 180F and your IAT around 140F. That is hot. Hotter the motor/air temp, the more the chance of pre-igntion and knock.

Great numbers, Whats the total timing in boost?

[boost_boy]

:P

Generally when tuning a car you want the temp around 180F and your IAT around 140F. That is hot. Hotter the motor/air temp, the more the chance of pre-igntion and knock.

Great numbers, Whats the total timing in boost?

[RMiller]

. The hybrid turbo I'm using seems to come on to boost around 3000rpm and reach full boost by 3800rpm and pulls till I hit the 8750rpm rev limit Dee

I understand the conrod bolts aren't up for that kind of engine speed, am I right? When I got my eprom chip the seller said it wasn't safe to rev past ~7400. The logic is mostly based on the risk being higher than the benefit w/ stock head, so why do you rev that high if you're making full boost at 3800? Too lazy to shift?

[boost_boy]

I understand the conrod bolts aren't up for that kind of engine speed, am I right? When I got my eprom chip the seller said it wasn't safe to rev past ~7400. The logic is mostly based on the risk being higher than the benefit w/ stock head, so why do you rev that high if you're making full boost at 3800? Too lazy to shift?

Laziness has nothing to do with it! I rev it like that because it can and the mph factor benefits as well. My car is geared for top speed, so I don't mind revving it a little bit. In case most of you aren't aware, I do have a fully built engine that's been waiting on an engine stand for quite some time. That thing will get revved and it's gear box is even more complimentary of the high rpm associated with big cams, solid lifters, racing valve springs, and a host of other go-fast goodies.

Dee