Whats up everyone, so I got my first Evo last week and I'm going to be tuning it to e85 on Friday. I'm dropping the car off though Thursday night and I just wanted some idea of what to except and what to tell them to have the PSI at.
The car has 1000cc injectors with a walbro 255 pump for the fuel. I've got HKS 272 cams, evo 8 10.5 hotside turbo, MBC etc.
Just wanting to know what PSI is safe to run the turbo at to still make good power.
It's my daily driver so I want the tune to be relatively safe but I still want to make some good numbers.
Just wanting to gauge what I should expect and know what PSI to run.
Thanks in advance!

 

i would probably say 25psi and it should be good assuming you have a good FMIC. there is a few guys running 1000cc injectors with stock turbos on e85 in the 400-400+hp range

 

On a 10.5 hotside stocker for reliability, I would say 24psi or even 25max. After that you would be just pushing hot air I believe.

Also rec. headstuds if you don't have them already.

Good Luck. Also I have read that the HKS 272 cams are milder in lift. and don't produce as much as say a GSC s2 or Kelford.

 

26 to 28 psi, or until it start knocking.

 

the stock 8 turbos will run 30psi all day long and never fail as long as the boost curve is tapered off accordingly.. its perfectly fine and safe to spike to 30 and taper off.. now if you were to try and force 30 to redline then yes you'll kill the turbo.

if you have to tell the shop what psi to safely tune you at that is not a good evo shop to have tune your car. the tuners most important job is to find proper balance in the tune. especially with e85 where it can pass mbt before even knocking.

MHI turbos are rugged as hell.. they are one of the most respected turbo industries in the world. I ran evo 3 16g's to 33psi+ for over 2 years straight without any failures back in the day (made up for low compression with more boost).. you will rarely see MHI turbos fail period. you have to literally want to kill the turbo to kill it in this situation.

 

Cool, good info! I mean I'm sure they don't need me to tell them how to tune it or anything, I just wanted to know a safe PSI to run the turbo at. Thats good to know that they can handle 30lbs.

Any ideas on what kind of numbers to expect?

 

post your full mod list and ill answer that.

 

Have the tuner decide on what the boost should be set at... I mean thats what you are paying for... He'll be able to adjust whichever table to run it at optimal power/boost...

 

Mod list coming at ya!


Stock block/ported head
ARP head studs
HKS 272 cams
Vishnu adjustable cam gears
PTE 1000cc injectors
Ported exhaust manifold
Evo 8 turbo with 10.5 hotside
Walbro 255 pump
Works throttle body shaft seals
Buschur MBC
Ingals torque damper
3" turboback exhaust (Perrin cat delete, unsure who the rest is from)
Stock ecu tuned with tephra v7 ROM
Mishimoto radiator
Shaved valve cover painted wrinkle black.
Slight wire tuck

 

im tuned for 28psi on e85 with stock ix turbo. Occasionally spikes to 30-31psi depending on the weather.

 

well over 400 on e85.

ported head
ported exhaust manifold
pump
3" tbe
buschur mbc
hks 272

fmic wont matter on e85. what about the bov? it may leak especially if its not crushed. injectors will barely make it also.

what about air filter?

boost leak tested the car?

 

It's got the stock 9 bov, how much boost can that hold? It also has a K&N cone filter.
I havent had it boost leak tested but before I take it to get tuned I was planning on tightening down all the clamps for the intercooler piping as an extra precaution cause i don't want them coming off on the dyno.
Also isn't it not a good idea to push the injectors past like 80% duty cycle or so?

 

100% idc in evoscan isnt really 100%.. its around 15-20% lower then what it says.

stock 9 bov uncrushed will start leaking at upper 20's slowly.

its good to tighten the clamps but that does no good. you need to pressurize the system to confirm there are no leaks overall throughout the vacuum lines, seals, gaskets, etc.

 

Gotcha, ill try and do a boost leak test too before I take the car in.
Thats interesting about the injectors too, seems weird.
One more question, I've never heard of crushing the bov. Got an explanation on that? Also what bov would you recommend for my set up?

 

do this instead; http://www.thedodgegarage.com/turbo_bov_mod.html