w/ meth injection how much turbo boost?

[esoung]

I just put in a Holset HX-40 when my T60-1 turbo broke and now I'm intending to run at high boost, but with my 9:1 .20 over piston I'm limited to 26-28psi. I have a couple of options; 1) put 8.3 pistons, 2) put head shims, or 3) go with meth injector system.

I know that optional 1 and 2 with enable me to run much higher boost, however I don't know much about the meth injection. Do anyone know how much boost I can go if I do a meth injection system?

 

[tsimiz]

i have ran 29psi on meth with a bigger jet

 

[nightspeed87]

I think 8.3 compressor pistons would be more street friendly, but you could just put the bigger jet and do some 8:8's and perhaps a bigger front mount ( depending on how yours is now ) and run your intake cold air ( dont know how much that helps but who knows.)
And doing this stuff should allow another 2 to 3 psi id like to assume.

 

[esoung]

I think 8.3 compressor pistons would be more street friendly, but you could just put the bigger jet and do some 8:8's and perhaps a bigger front mount ( depending on how yours is now ) and run your intake cold air ( dont know how much that helps but who knows.)
And doing this stuff should allow another 2 to 3 psi id like to assume.

Several people told that 8.3:1 compression is the way to go. If I switch to 8.3:1 I basically have to tear the engine apart and rebuild it again so I'm thinking if I need to do that I might as well put a 2.3 stroker in. Does know if I can use my current setup or 9:0 is still too high. Also another thing, I have heard that stroker gives more low-end power and torque, but does anyone know by what margin?

 

[nightspeed87]

I plan on going stroker one day...
From what ive gathered about strokers, they arent the cheapest things to build and can require a good deal of research, and that higher compression works well on strokers ( like the compresson your running now ) not just because they require less timing advance but supposably that you can get away with low timing adv and make good numbers due to the 20% more air your flowing making up for torque loss of low timing. ( Someone feel free to correct me on that as I am still in research myself but from what ive come across. )

But what I do know is that a lot of ppl are afraid to rev this thing above 7k due to the rod angles and slower stroke... From talking to a few hardcore stroker owners and shops, they say 8.5 is the limit on the stroker before harsh side loading occurs, and for a motor that is suppose to last ( like a daily driven car ) a 8 k rev limit would be fine.

My plan is, 8:8 stroker or a 8:3 stroker with say a max of 13deg timing advance depending on how much boost im trying to run ( upwards of 20lbs on a 50trim sized turbo because anything smaller would be a waist of a lot of power) and I hear fp3 cams are needed to pull the most out of the 2.3L. but according to dsm-onster, Fp2x's with proper adj cam gear tuning can achieve similar results as the fp3s...Also im going to run mines to 8k rev max. But without a turbo that can hold boost to 8k would be pointless revving higher but
If you have the money to tear it apart you might as well go stroker if your not trying to rev plus of 8k in my opinion.
Im thinking a stroker may be a little harder on drivetrain parts though from the overall torque gains.

 

[esoung]

On, that help. Just one final question, if I go that way do I need to change my pistons to stroker pistons or normal stroke pistons will work?

 

[bling5tatus]

Normal pistons will not work.

 

[HustlerTalon]

I have 8.8:1 and meth injection with an M15 nozzle...have ran up to 28psi.

 

[esoung]

I have 8.8:1 and meth injection with an M15 nozzle...have ran up to 28psi.

ok, i need to change to 8.3:1 whether or not i go with a stroker kit. i want to boost at least 35 psi.

 

[Boo5t_Addict]

To boost 35 psi, you're pretty much going to be stuck with using race gas only. Unless you want to drop your compression even further. Heck, you could lower it to 6:1 and run upwards of 40 psi all day long, but it doesn't mean your car will be any faster. I would say go with meth, and when you hit the track just load the tank up with C16.

 

[JayRolla]

Convert to E85 and all your worries will be gone.

 

[thekellbeast]

I hate it when people say that in every thread. E85 still isn't available in most parts of the country.

 

[prostreetdsmx1]

i really wish we had more e-85 here in the DC area.

Back on topic. Meth is a great tool when you can set it up properly. The problem we have seen is that a lot of people have been just throwing it on without really setting up all the support needed. We have seen some very catastrophic damage caused by poorly setup Meth kits.

However when you have a tuning system setup for Meth and have a good kit you can see some huge results. We have built countless EVOs and STis with Meth running everything from stock turbos to GT35s at 30psi on pump with Meth and they make AMAZING POWER.

Needless to say i would stick with the 8.3:1 setup for a real good street setup but if you really want to run 35psi I would not try to push the pump/meth system. Stick to race gas for that.

 

[JayRolla]

I hate it when people say that in every thread. E85 still isn't available in most parts of the country.

Usually when your to the point of race gas or meth you can do it.