whats the max boost on a stock rebuilt motor

 

Same as a new motor. Just make sure you follow the builders break in procedure.

 

na motors got 35k on it wondering how much above 14psi i can run

 

How much boost you can (safely) run depends on your mods. Read the stickies at the top of the section for some good info.

 

31.4 psi on C16

 

i am just wondering how many psi i can run with my t78 i have all supporting mods i just want to know what people think the motor can handle safeley

 

properly tuned, 25-30 psi on C-16.

 

how about on pump gas
would the seals hold up to 18 psi

 

High boost can't physically break an engine or its seals, if it's tuned and running properly. The kind of turbo doesn't matter. However, it will lose compression a little faster and the o-rings will break down sooner.

So if you want to run 25psi it will work if you can feed it enough race fuel and live with a rebuild more often.

Dave

 

It also depends on which apex seals you are using. 2 pcs or the 3 pcs.

 

I don't think that's a black/white true statement. In any case, 3mm seals are not going to be found in a "reman".

Dave

 

just want to know what i can run on pump gas reguardless of tuning and what not with out hurting the motor too much just for like racing 1/4 mile for ***** and giggles

 

Then your question is really a T-78 efficiency and tuning question. It doesn't have much to do with the reman engine.

Dave

 

You CAN do anything you wish. You CAN slap a T-78 kit on and go run around on 87 octane in the 500 rwhp area. You most likely will not be happy with the results.

With this statment you just made ^^^ zI'm guessing you really don't have the ability to use the Greddy T-78 kit, or any other full turbo upgrade. I'm also guessing that you are looking for just general info on turbos and rotorys.

This is one very important rule :13b's can generate power numbers at the wheel in the upper 400's in stock form on pump gas. Going over the 500 mark requires making the motor more rigid, to prevent the rotors from contacting the rotor hoiusings. You do not need porting to acheive thoose numbers, although using stock ports is kind of like pissing into the wind and trying to not get wet. Oil modifications should also be employeed on all application fromt he high 400's and on.

The boost pressure is less important than the HP number desired. If you want 550 rwhp out of that reman that you have, a T-78 will get you there just make plans to get another reman soon.

Ryan

 

i have a wide band and jason set up the car with really consertive timing i just want to know if people think it would be safe to run 18 psi on stock motor


jason any feed back


and no i am not looking for genral info i am not a f*cking noob

 

So why didn't you ask that question 2 days ago?

Dave

 

sorry that i dident soo whats your opnion dave

 

mike, 18 psi is not unresonable on pump gas, but you must have good/conservative tuning. My car was tuned to about 18 psi on pump gas by steve kan. I then put a full tank of C16 in the car and personally tuned it up to where it fluctuates between 22-25 psi. Pulls like a mother. I made sure my timing was around 15 degrees, and 12 degrees split. I also kept my AFRs to around 10.9 - 11.0. I would be more then happy to help you out on the tuning, after this winter, as soon as the weather breaks. My car has held up really well this summer and my vacuum is staying rock solid (knock on wood). I have more beating/miles on this motor at over 20 psi then i did on my last 2 motors at around 15 psi. So it really is all in the tuning.

Another suggestion is getting water injection, which i also have, which isnt currently working right now, lol. I know a lot of people who are running over 20 psi with pump gas and water injection.

Adam

 

P.S. how is the mr2 doing?

 

18psi is outta my league, sorry I can't contribute on that. But it's different question than 25psi or 14psi.

Dave

 

30 psi no problem with a proper tune

 

see signature


and also check out importrx7 https://www.rx7club.com/members/importrx7-24251/ hes made 380hp @ .95bar=14 psi on stock motor. tuned by jason @ rx7store.net

 

the mr2 is doing great but i want to put a rotary swap in it

 

seems like it would be a lot of work, being rear mounted. good luck though.