Max Boost!?!

[1fast97gsx]

I know I know people ask this all teh time. Well I have a somewhat built up motor so this question hasn't been answered all that many times. I just want to make max hp out of my setup. My mods are as follows:

Block bored .020" over and honed
Ross 8.5:1 pistons
Eagle Rods
no BS shafts
All new gaskets / seals
ARP headstuds
MLS 4 layer headgasket
1g head ( mild porting and fresh rebuild )
1g 5 speed cams
decked block and double decked head
FM bearings
Big fmic with custom piping
Greddy Type S bov
1g intake mani / throttle body
PTE gt35 turbo ( most likely .. might pick up today )
tial 38mm wastegate
660 injectors
afpr
255 pump
safc
3" turboback
HKS evc4 boost controller

I know on the street 21-24 is prolly the most I'll run, but what about on race gas and at the track? This turbo seems to just start making its power around 25 psi so I wanna kick it up when I'm actually racing ... What do you guys think? With tuning of course!!

 

[L2RTSiAWD]

Essentially you can run a much boost as you can tune for with little/no knock depending on your fuel system.

You could run 30psi if tuned properly

 

[1fast97gsx]

yea that's what I was hoping for. At what point does O ringing the block become necessary? Also ... at what boost levels do 660s usually become insufficient on a turbo of this size? Thanks.

 

[turbo90gsx]

660 are quite large. Im gonna say they are probly good to 475-500 hp

 

[1fast97gsx]

hmm I see. I've been hearing a lot of people getting injectors in the 700s if they are planning on running high boost on big turbos. Hopefully these will be good enough.

 

[leet]

I'd run 720's on that setup, personally. If you are going to use race gas @ the track, that is.

 

[1fast97gsx]

ok but will these injectors be sufficient for say 24 - 25 psi on the street on 93 or will they be too small for that too? Also ... I changed turbos ... I didn't get the gt35 last night, but I have an sc61 coming now with an equal length manifold

 

[Groomz]

Just for shits & giggles, check this out:

http://www.elektro.com/~audi/audi/toluene.html

You could run a little higher boost on the street if you plopped some of this in your tank. Of course its a friday/saturday only thing, not something you can do all the time ( $$$ ).

 

[1fast97gsx]

you know that's actually not that bad ... at local Gas Citys they sell race gas ( 100 octane ) and it's like $3.59 a gallon or something like that ... gets rather expensive. At my local track ( rt66 ) it's $4 a gallon for 100 octane.

 

[CR95GST]

Originally posted by 1fast97gsx
you know that's actually not that bad ... at local Gas Citys they sell race gas ( 100 octane ) and it's like $3.59 a gallon or something like that ... gets rather expensive. At my local track ( rt66 ) it's $4 a gallon for 100 octane.

, 100 octane at the pump here is $4.39/gal and at the track 110 is $5/gal and 112 is $6/gal.

Another reason some of the guys run 700+cc injectors is to keep the duty cycle down. I would think it would be better to run 720s at 80% duty cycle than 660s at 90+%. I've also heard that once you go above the 660 mark, it's best to invest in a standalone such as a DSMLink because the SAFC runs out of correction.

 

[leet]

Originally posted by CR95GST
, 100 octane at the pump here is $4.39/gal and at the track 110 is $5/gal and 112 is $6/gal.

Another reason some of the guys run 700+cc injectors is to keep the duty cycle down. I would think it would be better to run 720s at 80% duty cycle than 660s at 90+%. I've also heard that once you go above the 660 mark, it's best to invest in a standalone such as a DSMLink because the SAFC runs out of correction.

Correct. The DSMLink is a MUCH better tuning tool than the SAFC. It's just more expensive, but you get what you pay for.

 

[1fast97gsx]

yes ... dsmlink is in the future.