FP Green boost

[EyeWhen]

hi all
i have a stock 7bolt with arp head studs..how much boost can i safely run with a FP Green?

 

[DSM_PWR]

50 psi!!!


no but seriosly fill out your profile or at least give us an idea what kind of other mods you have..

example.. fuel/tuning/ is most important

 

[DGajre777]

Less than 10psi assuming you still have the stock 2G BOV and no other mods.

 

[EyeWhen]

whoops done and done

1g BOV
660cc injectors
AEM fuel management
3" exhaust
ported stock o2 housing
FMIC

 

[BINGchndlr]

im running 25psi on a green

 

[DSM_PWR]

i would say less than 20psi considering an uncrushed 1g bov isnt rated passed 20psi

 

[Smokin80]

disregarding your tune...that motor will handle 400+whp

Now, with a good tune and you are sure there is no knock you should have no problem putting 25+psi through that motor.

If you have no idea wha you are doing then keep it below 20psi.

Do you have a wideband?

AEM Fuel Management? as in AEM EMS?? orrrrrr..

 

[EyeWhen]

really! so 25psi on stock 7bolt is no problem at all? (with good tune of course)

yes i have the AEM UEGO and AEM EMS

 

[EyeWhen]

Im asking because i have been tuning for 20psi. but it is boost creeping to 25psi in 3rd gear.

 

[DGajre777]

really! so 25psi on stock 7bolt is no problem at all? (with good tune of course)

As for the boost creep, port the turbine housing or go with an external gate.

 

[Smokin80]

It sounds like you probably know what you are doing or have someone that knows what they are doing so i would say go for it. Sure...you start pushing things hard and something might give. But i feel very confident that you can handle 25+psi on that setup. Do it slowly and make sure everything is perfect before you keep upping the boost.

Not uncommon to see 450whp from a stock 7 bolt. Many guys are pushing stock 6 bolts well well over 500whp these days on E85.

Have fun.

 

[TxR6guy]

The Green loses effeciency after 27psi so 25psi would be good enough.

Btw are you on the Dallasdsm.org board?

 

[Smokin80]

sounds good to me...let us know how it goes

 

[EyeWhen]

excellent!

This is my first 7bolt(and first 2g). Ive had 3 1g's previously. But this is the first non-SAFC car ive had, so quite the learning experience. I guess if 25psi is safe i wont worry to much about the boost creep for now

 

[DGajre777]

I guess if 25psi is safe i wont worry to much about the boost creep for now

You should worry because that 25 psi could creep to 30+psi...

 

[EyeWhen]

You should worry because that 25 psi could creep to 30+psi...

Ah. Point taken. Ive already ported the o2 housing, would getting a bigger one help? Or will porting the wastegate opening and new flapper the way to go?

 

[Smokin80]

external wastegate FTW

 

[crimsondragon]

You do realize stock 7 bolts start to reaalllllly be pushing the limit after 20 psi. Put some ARP bolts and a stronger headgasket, then take it to the dyno to see how much psi you can safely run.

 

[Smokin80]

You do realize stock 7 bolts start to reaalllllly be pushing the limit after 20 psi. Put some ARP bolts and a stronger headgasket, then take it to the dyno to see how much psi you can safely run.

maybe it is....but i ran my 7 bolt for 2 seasons of drag racing at 23psi on a supra side mount with meth injection and had no problems whatsoever.

I might have been lucky and i probably was...but so what. You gotta pay to play.

 

[FonZ454]

You do realize stock 7 bolts start to reaalllllly be pushing the limit after 20 psi. Put some ARP bolts and a stronger headgasket, then take it to the dyno to see how much psi you can safely run.

Too broad of a statement. 7 bolt motors are still stout as hell, and will last a long time, well tuned, at 20+ psi.

I'll be exploring how much boost I can run out of a Green on a stock motor on pumpgas soon enough.