Ive heard both stories , im not sure what to believe on that one though?

https://www.evolutionm.net/forums/fu...rb-weight.html

 

love white evos.. very nice evo. that track looks dangerous as hell at that curve.. it just dips down.

also you should shoot for 12.5 afr at spool for maximum spoolup on 93oct.

 

LOL Thats just the track exit , i was going about 5 MPH.

Mine is Shooting for 13.3 in ecuflash , and hovers in the 12.6-12.8 range according to my AEM WB. Are you having better results with slightly richer and more timing?
I dont do as much tuning as you, maybe you know something i dont.

 

Yea. Theres some confusion over the curb weights.

Heres what all the service manuals say. Funny thing is I thought the 04 GSR weighed 3262, but the 04 service manual says 3320. But they dont specify if thats the GSR or the GSR w/ SSL. I "think" its the SSL.

 

White EVOs are the best. Thats why mine is white

Silver is the second best color.

A slightly richer AFR will increase EGTs, which helps spool.

 

^ I guess im glad to have easy access to our corner weighting scales , Thanks for the info i never knew what to believe!

 

Yeah. I have scales too. I love having them and knowing the accurate weights of my cars.

 

Looking good sir, and thanks for the efforts to compile everything in one thread!

 

Yeah now we just need a few more dyno charts ,,,, AHEM!

 

Leaner AFR's increase EGT's

 

^Jay probably hit up happy hour early

 

Thats what most think, but a richer AFR n lower timing raises EGTs more and spools the turbo faster.

 

LOL no happy hour for me.

Here is a list of things to help spool and a thread of its discussion.

Top 10 notes for FASTER SPOOL

1) Less timing (Start with stock values during spool, tune from there)
2) Richer AFR (mid 12s during spool to max boost, then taper richer)
3) Hot pre turbo exhaust
4) Port head, manifold, turbo, O2 for more flow
5) Free flowing exhaust
6) BOV leak free
7) Free flowing, low pressure drop, high efficient FMIC
8) Waste gate sealed shut until peak boost is achieved (Higher tension)
9) Shortest intake pipes as possible
10) No boost or vacuum leaks

https://www.evolutionm.net/forums/ec...ter-spool.html

When using a richer AFR and less timing, the exhaust that comes out still has unburned fuel in it, that proceeds to burn in the exhaust runner, making your EGTs raise and helping to spool the turbo faster.

 

Ive tried the low timing method , even though it creates more boost earlier , the car feels laggy . And according to VD tests ive done , makes less power in spool versus shooting for high 12 AFRs and maxing timing to the engines desire (however peak torque was made earlier and came on stronger which is undesirable to me on a stock block). That was on the stock turbo though , maybe with this larger one it could change.

The statement that richer AFRs create higher EGTs is false by itself , This is common knowledge, (Only when coupled with very low timing could this be correct) . Decreasing timing would be primarily responsible for the higher EGTs .

I will try the low timing and slightly richer method later this week and post back to back results.

 

I have seen lean mixtures make a turbo spool much faster than a rich mixture.
You forgot to add cam timing to your list. Intake cam advance will make boost quicker