Dyno Day revisited 1 week later!

[djmace]

OH yea i got u beat! I KNOW FOR A FACT im the only one in the State of North Dakota with a CA motor and the only one with Kouki Tails!!

[RMiller]

Would you rev that high if you didn't have a backup? What limit would you recommend someone use if the car is their daily driver? You're crazy, I like it.

[boost_boy]

Would you rev that high if you didn't have a backup? What limit would you recommend someone use if the car is their daily driver? You're crazy, I like it.

I normally keep in the range of 8,000rpm to with supporting the turbo whilst trying to keep the engine in it's sweet spot. Someone with no standalone and no ability to cut fuel or ignition, 7500rpm is good enough.

Dee

[float_6969]

I really don't think the bottom end of the CA is the concern with the Revving. I think one of our members accidentally ran is up to 9K+ and it held together just fine. The stroke is short enough that I don't think that is much of a concern. My mods for a 9K redline would be valvesprings and cams to make it worth going that high. I don't know that you'd still be makine any worthwhile power that high with stock cams.

[81na ZX]

I really don't think the bottom end of the CA is the concern with the Revving. I think one of our members accidentally ran is up to 9K+ and it held together just fine. The stroke is short enough that I don't think that is much of a concern.

The rule of thumb is 4500 fpm piston speed for "regular" OEM components. i.e. the stuff GM puts in the old 3100 that EVERY GM CAR CAME WITH A CA18 will hit 4500 feet per minute @ 8200 RPM. The rule of thumb for a "built" engine is 6000 fpm. A CA18 will hit that at 10910 RPM.

Thats for bottom end only obviously...

[boost_boy]

On a stock CA, you're losing power at or around 6800rpm. looking at my dyno sheets for runs with and without cams tells me the true story. With cams, the engine was still making power @ 7250rpm before I let go of the gas pedal. I do know one thing, the stock CA is nothing to sneeze at.

Dee

[RMiller]

I'm curious about this stuff because it may be advantageous to rev higher, even though power drops off, if you have a bigger turbo. So the usable powerband is bigger. Heck, if a turbo reached full boost from 4500-5000 moving the limiter from 7400 to 8200 may be worthwhile.

[iliketocrash]

I'm curious about this stuff because it may be advantageous to rev higher, even though power drops off, if you have a bigger turbo. So the usable powerband is bigger. Heck, if a turbo reached full boost from 4500-5000 moving the limiter from 7400 to 8200 may be worthwhile.

what're you looking for, a dyno queen or a quarter mile monster? I like having a lot of horsepower but i don't feel like waiting forever to get up there, but we're all looking for different things. please don't think i'm trying to be a prick. i'm just curious.

[RMiller]

I'm not looking for either of those things. I don't really know what I want I guess. I like the "out of control" feel and I find mustangs (I have one), even the c6 vette, and most bigger displacement, early torque/falling powerband cars boring to drive.

The most powerful small displacement turbo car I've driven is a 7 w/ around 300whp(converted non-sequential). Most powerful car period I've been in is a sl55. 7 felt faster, and that's what I like. I can probably deal with a .63 a/r 50 trim as long as I hit full boost before 5k to allow for a decently sized powerband. I know that turbo can do 500whp on race gas, an easy 400 on pump on countless dsms. I was actually surprised Dee didn't make more power w/ the .48. Maybe there is quite a bit more power to be gained by the bigger turbine housing. Or maybe it's all in the head.

[boost_boy]

I'm pretty sure difference in the car's power had a lot to do with temperatures, A/F ratio and camshafts. I compared the two dynos done 1 year apart, one had cams and one was stock and I must say cams made a difference of about 30whp and longer duration of high power before the fall. I will eventually load this engine with the good stuff, but not right now. It runs very good for being stock and that was the whole idea, to see how much a completely stock CA18 can put-up with.

Dee

[Looneybomber]

Dee, it's good to see you got your fuel issues worked out. Not to mention you got your A/F ratio where I think it should be (in the 13's)

Float. Come'on, I know HP is addictive, but is it really worth getting a t3/t4 just to put down some big numbers? Don't let your GF's brother fuel your ego

[boost_boy]

Dee, it's good to see you got your fuel issues worked out. Not to mention you got your A/F ratio where I think it should be (in the 13's)

Float. Come'on, I know HP is addictive, but is it really worth getting a t3/t4 just to put down some big numbers? Don't let your GF's brother fuel your ego

Straighten out one issue and create another one. My experiment with a RWD motor and this one's oil pump gave me the middle finger . S.O.B dropped oil pressure on me for a little while and it was enough to cause run-out or tapering on the #2 journal's track, which ultimately cause the bearing to spin, which ultimately cause the engine to knock, which ultimately caused the engine to lose power, which ultimately cost me a turbocharger cartridge, which ultimately cost me money to rebuild it, which ultimately was not fun seeng that I rebuilt the engine with the block in the car, which ultimately was somewhat lazy of me, and that's what makes me no better than anyone else . Engine's nearly finished with a new crank, rods and main bearings, CP pistons, racing valve springs, ported head, reshot-peened rods, 1.2mm metal headgasket, ARP studs, a new turbo, car with a new drag suspension from ground control and AGX, re-installation of 2nd BOV, axles re-done, new cross drilled and slotted discs (front and back), new stainless steel brake lines, and hopes of having this car ready by April 3rd for the sport compact car event at Moroso Motorsports Park. All this on my Girlfriend's/babies-moma sentra (what a waste) .

Dee

[float_6969]

I don't think I'll need the Hybrid Looney. I've decided that I'll stick with the T28 for the spooling time and driveability. And if I really want some crazy numbers (dyno queen if you will) I'll throw a 50/75 shot of nitrous on there and get it up over 300hp pretty easily. That should be pretty fun in a 2400lb car, dont' you think?

[Turbogixxer]

and hopes of having this car ready by April 3rd for the sport compact car event at Moroso Motorsports Park.

Good luck, what class you going to be running? I wish I could be there.

[kuruma]

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.

i havent said too much on this forum... but1. Nice numbers2. I have to quote you in my sig on other forums now.. if you dont mind

[boost_boy]

Good luck, what class you going to be running? I wish I could be there.

Thanks man! I think I'll be running in the super street class, if I'm not mistaken. I look forward to this outting and by it being the 1st event of the season, it ought to be fun. Big boost time . No more Mr. 15-20psi!

Dee

[boost_boy]

Well, I hope to have the ride up and running tonight! My hybrid turbo is not ready and won't be ready till tomorrow, so I'll just whack the 60-1 with the .63 rear and try and get the new components broken-in and off to the dyno we go. The new suspension isn't on the car just yet, but I will try and have it on by at least tomorrow night as well. I'll keep you guys posted on this car's progress.

Dee

[cortina-mk1]

good luck dee im running again on the quarter also this weekend ..fingers crossed

[boost_boy]

good luck dee im running again on the quarter also this weekend ..fingers crossed

By all means "Good luck". And I hope you get the peformance you seek from your car. I've been working on this for nearly 7 hours this evening. The car is still not running, but I hope to wake up later and try and finish up. Looks like I'll be using a 60-1 blower because my original turbo isgetting rebuilt and may or may not be ready. Preparation sucks .

Dee