spool time on a .63 exhaust
 

Got my new turbo today, a m27 .48 compressor .63 exhaust. Looking for a idea on the spool time for my D16A1. Looking for top end power 8)

Re: spool time on a .63 exhaust
 

itll hit 10lbs around 6800 ... lol

Re: spool time on a .63 exhaust
 

Prob.ly 5K ish but there are a lot more things that could effect spool up time

Re: spool time on a .63 exhaust
 

5k-ish is cool, I can rev to 7.5k. I'll be using a 2.5 exhaust turbo back if it helps to mention.

Re: spool time on a .63 exhaust
 

run a 2 1/4 in. dp it will help spool time ... id say 4800-5200 leaning more towards 4800 though full boost 10 lbs

Re: spool time on a .63 exhaust
 

Did I mention is external wastegate setup? ;D

Re: spool time on a .63 exhaust
 

Ive got ~15psi on my t3 60/63 on a lower compression d16z6....by 3500rpm... 3in DP right off turbo. Honestly... its suprised me alot.

Say I floor the car in 4th gear at 2500rpm... i have over 10psi just past 3k.

Re: spool time on a .63 exhaust
 

hmm, what compression? I'm gonna be running custom weisco 9.1:1 pistons for a closer to normal compression (9.5:1) for my normal driving & low to mid power.

Re: spool time on a .63 exhaust
 

Compression is going to have next to zero effect on spool time.

Most of the spool time is going to be due to manifold design, and tune.

I had a .60 trim T3 with .48 turbine that spooled at 2500 rpms on my LS. Swapping to the .63 housing, and adding a very large 24X11X4" FMIC, I spooled at 3000 rpms. Whoopty-----, 500 rpm difference... keep in mind we are still dealing with tiny OEM "stage 1" turbine wheel.

Re: spool time on a .63 exhaust
 

I will be using either a equal length sidewinder style or a ramhorn. Audi 5000 FMIC

Re: spool time on a .63 exhaust
 

The (long runner) equal length bullshit makes you spool like ass.

Go with a short runner with precision cut merge collector. There is no power limiting difference, and you spool a lot quicker. Unequal length runners mean ---- all for practical forced induction applications. If you were trying to pair cylinders and time pulses, sure equal length means something, but when you dump all pulses into a common collector with a couple cyls having exhaust valves open at the same time it accomplishes nothing at the expense of spool.

Re: spool time on a .63 exhaust
 

so you think a log mani would be better? I wanted to keep ac and or at least the stock radiator. Thats why I came up with those manis. Thats why I skipped over the hf.

Re: spool time on a .63 exhaust
 

A log manifold is not a precision cut merge collector. Think of a ramhorm or the like without all the extra runner length or equal length nonsense concerns.

Log manifolds get the job done well for a cheap fun car, but if you want to make some power they act as a bottle neck and cause the individual cylinders to breathe differently... that does not make for a stable tune.

What power are you shooting for?

Re: spool time on a .63 exhaust
 

hes shooting for, ......... testicles in his mouth




carry on

Re: spool time on a .63 exhaust
 

No, I wasn't shooting for anything - I was teabagging you. Dropping versus shooting get it? :y You probably won't, never mind.

Well my car is at 146hp right now, I'm aiming for about 250whp on boost. My motor is excellent on low and mid, but lacks upper rpm power. I figure I want something thats spooled around 4.5-5k and will hold until redline at 7.5k. Thats why I chose a turbo with a .63 exhaust which combined with my crespo stage 3 cams should achieve that.

Scratching the log, done. I'm following what you are describing on point. Heres is a crazy idea, could I weld up what you are describing in a top-mount configuration in order to clear ac and the rad? what diameter piping is used for turbo manifold and what grade metel? The downpipe will be 2.25" mild steel.

Re: spool time on a .63 exhaust
 

Pushing a straight T3 to 250whp on a D-platform, I do recommend a merge collector as that is the beginning of where the border of safety on those engines begins. The merge collector is also good for not restricting flow, so it will help some with bottlenecking.

Spooling low doesn't neccesarily mean you have to sacrifice great top end. The system should work well all around.

Top mount is do-able, but when you say D16A1 I envision a tight engine bay from that era Civic (the 1G Integras I parted out years ago were all wrecked in the front, no idea about room in those) so you'll have to shuffle things regardless. You can probably keep AC, no comment on the rad... I'm thinking you'll have to fab a later half width unit in there and the upper radiator support is going to be problematic.

Go larger than 2.25" downpipe. 2.5 or 3 and you'll spool quicker AND breathe better at top end.

Re: spool time on a .63 exhaust
 

Okay, I was going on what I've saw on massive sites about turbos running out on top and actually causing power loss. Merge collector it is. Acutally my 1g teg has never had any front end damage, so its about 9" of clearance between the block and the radiator. Larger dp it is. I can do the half in the future np, I'm just trying to stretch funds as I don't work. Fabing up a top rad mount is np since I've gone rad fabrication before. In my fathers 85 corolla sr5 hatch we grafted on the 94 talon es body and I converted to the talons electrical fans in addition to modifing the cross member and rigging up the rad supports/mounts.

I must say that you are a informative all around guy cool, :6

Re: spool time on a .63 exhaust
 

9" is plenty, you'll be fine. I used to have an 86 CRX Si w/ D16A1, they have much less.

Re: spool time on a .63 exhaust
 

Trust I know, I've seen them before.