My KA-T ready to drop in...

[Bosrudorfer]

sweet! I want a longer dyno video tuned with linkin park music!

[crzycav86]

please no linkin park.

p.s: I could beat that slug in a foot race off the line..

[Craving4Boost]

why does retarding timing cause boost creep?

[pr240sx]

Bah... accept it, you were " sandbaggin' "

Nice ride, quite sleeper, dunno how the hell you race that kat with an open dif.

Next time, quit sandbagging and bring us some REAL numbers!!!

[silent dave]

definately was cool to watch that thing run yesterday. video was cool. didn't see myself but you can see one of my friends that was standing right next to me. good job with the car. made it worth all the wind burn i got watching.

[hannibal]

why does retarding timing cause boost creep?

Yeah, I was wondering about that too. Exhaust temp rises as timing is retarded. Maybe that leads to boost creep.

[huguetpj]

just speechless

[Bosrudorfer]

please no linkin park.

p.s: I could beat that slug in a foot race off the line..

what your a 50' cent fan? LOL

[9sec240]

why does retarding timing cause boost creep?

The air fuel mixture starts burning later and later the more you retard the timing... eventually with enough retard, the mixture is still burning when the exhaust valve opens... This basically causes combution in the header and that type of gas expansion outside the combustion chamber creates the boost creep.. This also causes burnt exhaust valves and elevated engine tempatures....

This is also how anti-lag works.....

[crzycav86]

Yeah, I was wondering about that too. Exhaust temp rises as timing is retarded. Maybe that leads to boost creep.

So basically this is the reason. Hotter exhaust causes more pressure in the manifold, causing extra spool so to speak.

[crzycav86]

what your a 50' cent fan? LOL

No. I'm just a fan of non-****ty music.

[9sec240]

This is a shot of a few graphs from Sunday morning.... I am pretty happy with the TQ curve that is holding pretty damn steady all the way to 8000 rpms.... The low HP graph is on pump gas with the timing retarded to keep the knock under control... You can see how crappy the run looks (very choppy).... I know I posted earlier that it made 550 something (because I honestly couldnt remember) but I guess it made almost 567 RWHP... I was more interested in AF ratios and knock voltage and of course, getting the car to the track

[MarkEmark]

haha, that torque curve is ridiculous!

Do you have a complete spec list for the car? Inquiring minds would like to know.

I know a mod-list for that car is seemingly endless but I'm curious as to what your engine internals are for it to be able to spin safely to 8000 rpms...I know you have crower rods, lightweight pistons, fully balanced assembly, stiffer valve springs, crower v3 cams, and probably a full port and polish/5 angle valve job (oversized valves too?)....what else?

And that power was made at around 25 psi, correct?

[LEMHEAD16]

Are you using the c4 trans or nissan?

[grimple1]

I think he's got the Turbo- trans in it. The C4 (I thought) was in another AMS shop car.

[jrivera]

i am pretty sure it is a C4 transmission

[Veriest1]

Now that I could run the motor for an extended period of time, I was able to top off the trans fluid and run it thru the gears... The AEM AT trans control is set up for an MKIV Supra and the shift solenoid A/B pattern is different from the Nissan AT trans..

I think it may be a Nissan transmission. It seems like I heard him mention a 4 speed nissan auto at one point to but I can't find it.

[jrivera]

look at what i found in the topic 'Ford C4 in an S13'

This specific C4 is built to the hilt... Its rated to over 800 HP.. Its set up with a reverse manual valve body.. what this means is that it will need to be shifted (there are no automatic shifts) and that the pattern is P R N 1 2 3 (forward gears are reversed)... We are using a B&M quick silver shifter to change gears.... Its a ratchet shifter... You can see Brad Davies car in action HERE... He has the first setup we made and is using a simular shifter... Both mine and Brad's C4s have trans brakes... A trans brake allows you to go WOT and not have your car move.. It does this electronically at the push of a button... When stopped in first gear, you press a button that activates the trans brake which puts the car in reverse ALSO.. with the trans trying to go forward and backwards at the same time, it locks your car into place... when you release the button, it lets go of reverse and your off like a rocket.... pretty pimp shiznat....

[Chris@AMS]

haha, that torque curve is ridiculous!

Do you have a complete spec list for the car? Inquiring minds would like to know.

I know a mod-list for that car is seemingly endless but I'm curious as to what your engine internals are for it to be able to spin safely to 8000 rpms...I know you have crower rods, lightweight pistons, fully balanced assembly, stiffer valve springs, crower v3 cams, and probably a full port and polish/5 angle valve job (oversized valves too?)....what else?

And that power was made at around 25 psi, correct?

FRH race ported head with competition valve job, Super Tech springs, retainers, Super Tech .5mm and .7mm oversize valves, Crower V3 cams, Cometic gasket, copper o-ringed block deck, 11mm ARP head stud upgrade, Arias pistons, Crower rods, Clevite bearings, fully grooved #2 and #4 main bearings, ARP main studs, crank is knife edged, shotpeened, nitride coated and fully balanced, oil pump is shimmed for higher relief pressure... Same motor you can purchase from us....

The HP has still not crested even at 8000 rpms which means the intake manifold, porting, and cams are doing thier job... My concern at 8000 rpms is bearing life.... Its something that isnt proven yet... There will be a lot of stress on components at that engine speed with a long rod motor...

The dyno graphs are for 27-28 psi...

[Chris@AMS]

Are you using the c4 trans or nissan?

Currently running the 300ZX TT AT trans...

[Chris@AMS]

look at what i found in the topic 'Ford C4 in an S13'

This thread was about Chris's 91 coupe... When I mentioned "mine" I was refering to the C4 I had built and not my car...

[nismofly]

Ivan youre posting on Chris' account

[9sec240]

yeah.... I know.... I was at work and didnt feel like switching screen names..

Information is still the same

[LEMHEAD16]

"Both mine and Brad's C4s have trans brakes... A trans brake allows you to go WOT and not have your car move.. It does this electronically at the push of a button... When stopped in first gear, you press a button that activates the trans brake which puts the car in reverse ALSO.. with the trans trying to go forward and backwards at the same time, it locks your car into place... when you release the button, it lets go of reverse and your off like a rocket.... pretty pimp shiznat...."

That is the slowest dam rocket I have ever seen!

[9sec240]

"Both mine and Brad's C4s have trans brakes... A trans brake allows you to go WOT and not have your car move.. It does this electronically at the push of a button... When stopped in first gear, you press a button that activates the trans brake which puts the car in reverse ALSO.. with the trans trying to go forward and backwards at the same time, it locks your car into place... when you release the button, it lets go of reverse and your off like a rocket.... pretty pimp shiznat...."

That is the slowest dam rocket I have ever seen!

Taken from a post titled "C4 in an S13"

Refering to "my" C4 transmission in Chris's S13...

My car has a Z32 TT AT with no trans brake... My stall is too tight... I am also not using nitrous on the launch as planned....

Give me a little time and the car will be pulling much better 60ft times...

[jrivera]

sorry ivan, chris, and everyone else for the mix up and misunderstanding

ivan, any reason why you are not running a C4 transmission?
Modified by jrivera at 6:23 AM 4/27/2006

[2FourTee]

ivan, any reason why you are not running a C4 transmission?

Maybe something to do with the class he will be competing in?? I am just guessing but maybe he has to use a Nissan Trans....??

[TheOne]

we want an update!