I want to run high boost!

[drcrmoon]

This is kind of asking a vague question but I would really appreciate a useful response.

I really want to run high boost like 22psi and I don’t have much done to my car. I plan on getting my 14b ported and I have a s-afc. I really don’t want loud exhaust for just driving around, so I was thinking about a dumptube. Propane injection sounds like something I would like. I was curious what is necessary; like must have things I presently have a K&N and PVC intake and Menard’s boost controller boosting at 17psi.

Thank you very much

Brian

 

[Black_90TSI]

Originally posted by drcrmoon
This is kind of asking a vague question but I would really appreciate a useful response.

I really want to run high boost like 22psi and I don’t have much done to my car. I plan on getting my 14b ported and I have a s-afc. I really don’t want loud exhaust for just driving around, so I was thinking about a dumptube. Propane injection sounds like something I would like. I was curious what is necessary; like must have things I presently have a K&N and PVC intake and Menard’s boost controller boosting at 17psi.

Thank you very much

Brian

 

[Wilsonman02]

A 14B will never run at 22psi effeciently. A 16g probably. But you'd need a larger turbo to run high boost. And if you dont have much done to your car, dont even think about propane injection. And to run higher boost, u need a better fuel system. But at least u have an AFC. And to run 22psi a better innercooler would be nice, so that u dont blow hot air into the engine.

 

[red91gst]

Have you logged the car at 17psi?

Seems abit much for a almost stock car.

To run the boost you'll definetly need a fuel pump and injectors. The afc won't help much on a stock fuel system, all it'll do is help to hit fuel cut quicker.

Remember, boost isan't everything. Think tuning.

 

[-=TWITCH=-]

you got money you can run high boost

 

[red91gst]

you got money you can run high boost

 

[DrZiplok]

Here. Start with this.

 

[peregrine]

yeah you guys are a big help. plain and simple if you want to run higher boost on a 14b you must

#1 only run 20-21 psi
#2 run 116 race gas


you can have a bone stock car and get away with this. i reccomend a fuel pump and a boost gauge though. its not effecient and its not practical but you can do it. definitely get exhaust soon. you can get 2 1/2" thats is very quiet. or just put a test pipe on the stock exhaust and it will pick up a few ponies and be very quiet.

 

[bottledbird68]

Originally posted by peregrine
yeah you guys are a big help. plain and simple if you want to run higher boost on a 14b you must

#1 only run 20-21 psi
#2 run 116 race gas


you can have a bone stock car and get away with this. i reccomend a fuel pump and a boost gauge though. its not effecient and its not practical but you can do it. definitely get exhaust soon. you can get 2 1/2" thats is very quiet. or just put a test pipe on the stock exhaust and it will pick up a few ponies and be very quiet.

I though 14b's were horribly ineficcient at 20-21 psi? Is there actually something to be gained by going that high on race fuel? Other than bragging rights of course...

 

[peregrine]

Originally posted by bottledbird68
I though 14b's were horribly ineficcient at 20-21 psi? Is there actually something to be gained by going that high on race fuel? Other than bragging rights of course...

hmmm lets see. two weekends ago i ran a 13.2@102 with nothing but 3" o2 eliminator, 190 fuel pump, 114 race gas and 20 psi. this was at 4200 ft. if i was at sea level i would have been kissing 12's. this is on a, other than the mods mentioned, bone stock 140,000 mile 90 awd. so to answer your question yes the 14b is ineffecient at that psi but race gas will offset any detonation and give you power. remember as long as you have the right amount of fuel (or octane) and air youll be alright.

 

[bottledbird68]

Originally posted by peregrine


hmmm lets see. two weekends ago i ran a 13.2@102 with nothing but 3" o2 eliminator, 190 fuel pump, 114 race gas and 20 psi. this was at 4200 ft. if i was at sea level i would have been kissing 12's. this is on a, other than the mods mentioned, bone stock 140,000 mile 90 awd. so to answer your question yes the 14b is ineffecient at that psi but race gas will offset any detonation and give you power. remember as long as you have the right amount of fuel (or octane) and air youll be alright.

Thanks!! I'm off to the track next wednesday (if they open ). I know what I need to try now! I was under the impression that I would be shooting myself in the foot trying to run that high. Guess I was wrong... Appreciate the input

 

[boosted59]

I ran 12.6 @109 on 18psi running 550cc and 110oct. I was running the Safc horribly rich and still on a SMIC. You can run a 14b to 21psi with out too many mods. Anything over 23psi it starts to push to much heat and begains to break down. The 14b is unfortunatlyvery underestimated and underated when it comes to making power. Its a damn good turbo just go ask Phil Beers he'll tell you.

 

[peregrine]

Originally posted by boosted59
I ran 12.6 @109 on 18psi running 550cc and 110oct. I was running the Safc horribly rich and still on a SMIC. You can run a 14b to 21psi with out too many mods. Anything over 23psi it starts to push to much heat and begains to break down. The 14b is unfortunatlyvery underestimated and underated when it comes to making power. Its a damn good turbo just go ask Phil Beers he'll tell you.

well said. i agree. im going to step up to a 20g this summer but i think i might try to run some mid 12's on the 14b first. that would be an accomplishment at altitude.

 

[drcrmoon]

Thanks for all the help I think I’m going to make a test pipe for the stock exhaust and get a dumptube that way it should only be loud at full throttle and get some 550s and a larger fuel pump. I was reading on here how propane injection is supposed to cool the intake charge and deliver higher octane. I guess I’m really curious as to why it would be a bad idea, of course I will be getting the 550s and larger pump first. But from what I read about propane injection I don’t see what would be bad about it for what I ant to use it for. Any more feed back is greatly appreciated

Brian

 

[ChicagoGSX]

Originally posted by peregrine


hmmm lets see. two weekends ago i ran a 13.2@102 with nothing but 3" o2 eliminator, 190 fuel pump, 114 race gas and 20 psi. this was at 4200 ft. if i was at sea level i would have been kissing 12's. this is on a, other than the mods mentioned, bone stock 140,000 mile 90 awd. so to answer your question yes the 14b is ineffecient at that psi but race gas will offset any detonation and give you power. remember as long as you have the right amount of fuel (or octane) and air youll be alright.

It's not just a matter of supressing knock. At a certain point the turbo isn't efficient enough and will overheat the air. If you have a stock SMIC it won't be able to cool the air and then you won't be making any more power than you would be at a lower boost.

 

[peregrine]

right. what point is that? 20-21 psi with race gas on the 14b is no problem. i think anything more is where you would reach that threshold.

 

[drcrmoon]

Another question i have is a supra smic or a dejon tool smic better and will i need larger intercooler pipeing?

Brian

 

[boosted59]

the supra side mount is an upgrade and so is the dejon tool but before you just slap 550cc injectors and a big fuel pump on your car how do you plan to control a/f ratios? You'll need an Safc or some other type of fuel control. Even on a 14b with stock injectors once you start changing boost levels and adding other mods you need to know whats going on inside your engine and how to make think that nothing has changed. The way i've done this is through o2 voltage and using an Safc to get it to the desired 'sweet spot' . If I was you I would get an Safc before injectors or a fuel pump. You can rewire the stock pump and 450 are big enough to support a 14b to 21 psi.

 

[drcrmoon]

I have a s-afc read my first post

Brian

 

[DeezNutsForYou]

450's are just barely (with straight race fuel) big enough. That should definetely be your next move, along with a fuel pump, and an EGT.