he guy i posted this elswhere maybe yo can help

https://www.rx7club.com/showthread.p...hreadid=259643

 

Clearance Issues??? I assume you are talking about the 6-port system, ACV and all that getting in the way of the turbo.... Have you thought about removing all that, grinding away the un-needed materials and having plates welded over the holes in the LIM?????

 

ok first of all I don't know of any TO4B that will fit on the stock manifold therfore trying to mate the stock manifold onto the N/a engine is pointless as you won't be using it. How much boost are you planning on running anyways? a TO4 is like 400hp kinda turbo. I think if you go with the stock S5 turbo you will be ok. But in any case talk to Aaron Cake on this forum he made a spacer to fit the stock manifold to the N/a.

 

http://www.aaroncake.net/rx-7/naturbo.htm

Check this out

 

If you go forward with this good luck, but in the long run it is going to cost more and give you alot of headaches to get it running right.

 

i dont want a spacer, nor do i want to use the stock turbo....i want a custon steel tube manifold, with external wastegate. i plan on boosting no more that 12 psi. maybe 14psi....i dont think a t04 is overkill either. the t04b is rated at 250 to 375 hp....i have already read aarons how to on turbo installation.i do not want to use stock parts, i want an all custom set-up. i have a very strong streetported motor that only has 9k on it....got to www.teamfc3s.com and look at my car under the members cars. its under the same name as here...im not just slapping a turbo on some bonestock n/a...ive done the research and have the funds to do it.

i dont whay everyone has to go off on a tangent when someone says "im gonna turbo my n/a" it has been done, its reliable, and its worth doing.....and no its not that expensive.....i spent over 700,000 yen or $7,000 on my turbo, fuel ,and fmic upgrade on my s-14 silvia....so me spending 3-4k on a turbo upgrade on my rx-7 is no big deal...i can do 90% percent of the work myself and i have buddies that run a tuning shop that i have dyno'd my car on before.....right now im running 183 hp at the wheels.....thats more than an 87-88 TII

 

WELL IF YOU sorry bout the caps anyways if you have seen Aaron's page you know you have to cut into the car for a stock turbo to fit with minimal clearance! Now your going to take a larger turbo and try to fit it on there. You will have to do this on your own because I don't think they have done a TO4 N/a yet. I wish you good luck but I hope you got a good front mount intercooler and maybe some water injection to fend off detonation.

 

12-14 psi is too much boosting on high comp rotors. My friend tried to do a high comp setup on his turbo prelude and lets just say it didnt go well......
http://www.imagestation.com/picture/...e.jpg.orig.jpg

 

12-14 psi is only too high if your turbo isn't efficient at that level and you can't tune it properly. Rotary Performance has installed 9.7:1 rotors in 400+ rwhp 3rd gens.

I say leave all the 6 port actuation alone so you still have low end. Why sacrifice? Mount the turbo in front of the engine like the prototype RX-8 kits or the Buick Grand Nationals. I don't care what anyone says, there is absolutely nothing wrong with this and is quite easily driveable with good response. The key is in proper turbo sizing. Run the runners low to the front and straight into the turbo. Simple. The exhaust pipe also has room to go back out through the stock location if you do it right. You will need a different fan but big deal. If you want to have more fun, set up the 6 port actuators to open based off of boost pressure so you get economy when not under boost. This is not any more difficult than trying to get the turbo in the stock location and if anything it is easier. It makes sense.

 

Rotary Performance has time, money and a dyno to tune it properly. I didnt say it couldnt work, but itll take a lot of money and time to do it right. But, if you can do it, more power to you.

 

If someone is going to put a turbo on an n/a, there is not excuse for not doing it right which is using a standalone ecu and proper tuning. This is really quite simple and not that expensive.

 

You DO NOT have to cut into the frame rail like Aaron cake did on his car to fit the stock turbo in there...
He simply did it to his because he didn't have a very appropriate exhaust manifold setup, IMHO.

And to whoever said something about 14psi being too much for high comp rotors?

This(as well as this whole topic really...) has been covered many a time here, its not boost that will make a motor detonate, it is improper tunning. Thats it, full stop end of storey.
It doens't even have much to do with crazy high air temps from high boost, because with any ECU worth its weight in cow **** should come with an air temp sensor, so you can tune around crazy high air temps, by retarding timming, adding fuel... etc...

 

Also to the original poster, if your making a custom manifold for your turbo I can't see there possibly being any clearance issues, mount it up higher and further towards the headlight, you should have no dramas that way at all.

Just do some measuring work with a measuring tape, then take said measurements to someone that makes exhaust manifolds, hey presto! you have an exhaust manifold after a few hundred dollars..
It's not rocket science..

 

Ummm kind of confused here isn't adding force induction *boost* to a high compressed engine will shorten the engine life even with proper tuning?

 

Yes

 

ARHHHHHHH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Depends how proper your proper tuning is, seems alot of people tune things for max power.. I know a few cars like that, then when the wether changes they detonate..

But no, I don't believe an engines life will be measureably shorter if its fed <20Psi of boost, I guess above that it might get slightly shorter if your using normal fuel. If your using better fuel then I don't think you'd have a problem again.

 

It shorts the life of any engine....

 

Can you please elaborate as to why this is the case? I'd really honestly like to know how this is true....

 

I know that but on a high compresse engine like ummm NA it shouldn't be that reliable like a low compressed right

 

IMO it shortens the life because its high compression, but I think on a lower compression engine it doesnt shorten it enough to worry about it. Honestly, I think it would be ALOT easier and cheaper to just by a TII instead of dropping a turbo setup into an NA. But if you decide to do it anyway keep us posted!

 

Ok so far thats three people that say it shortens the life of a high comp engine to have boost in it, with no doubt many more to follow.

Can someone enlighten me as to why so I too can be converted.

 

just use the HKS manifold... it holds the turbo way away from the intake. and it's only like $250.

 

I swear, if one more person who has ABSOLUTELY NO EXPERIENCE posts about turbocharging an NA, they will be banned.

The page on my site pretty much covers it all. If you make a good manifold, you don't have to worry about cutting the frame, spacers, or clearance issues.