ok another noob question is there any diffrence in the s4 or s5 i have a 87 n/a and im converting to turbo should i go with s4 turbo version or is the s5 better in anyway


Thanks, Michael

 

i prefer s4's myself, but many people prefer s5's.

if you are going to turbo a s4, then you should stick to s4 stuff. putting the s5 stuff in is possible but requires much more work.

 

Hes right... Stickin with the s4 will save you alot of headache (like wiring). The s5 IS more advanced than the s4, but just by a little bit. Keep in mind that we are just referencing stock vs stock. You can easily make a s4 strong as strong as or even more powerful than the s5.

 

you can easily use the s5 turbo in place of an s4 turbo.
The s5 is slightly larger.

 

Well im droping the whole Turbo engine ecu and tranny so didnt know what would b beter

 

turbocharging a s4 is not difficult. you can keep the same ecu. One thing that has to be closely monitored is knock (since your compression will be higher than a turbo 13b) and run lower boost. In the end you get more power and and torque.

What do you have or plan to buy, and we can help you piece everything together

 

well i didnt know i could turbo my n/a so at this point nothing i was told you couldent do it....

 

Disco kid you have no clue what your talking about. You can't use the n/a ecu and monition "knock". With s4 owners you can run a very ecu with the turbo set up or run a tii ecu.

Also sytle, s4 and s5 turbo's are the same. 1.0 hot side, and same compressor.

The s5 is not more advanced. It's because of the stock bleed type boost controller. \

S4 5.5 psi vs S5 7.5 psi

You can turbocharge an n/a. You could turbocharge anything if you really wanted. Also I have a s5 6 port turbo. It's pimp, but I need a new engine since I leaned it out. But yeah... do some research. All 6 port turbo's have been covered.

If you say it's hard, it's easy.

If you drop in a t2 tranny also, get starter, flywheel, clutch kit, drive shaft from t2 to n/a. Unless you have a t2 rear end.

 

so would it be easyer to drop in a turbo s4 or to turbo my n/a s4 ? and price? be about the same

 

Price is about the same, if you gather up parts. I believe, I spent about $900ish in parts alone. But I also have upgraded parts to put on 6 port turbo.

It'll be whatever you find best. For 6 port turbo, you have to have a tii intake manifold ported for 6 port engine. Japan2la, has them for sale. But I did it myself, so I saved a couple hundred.

 

I'm pretty sure the hotside is slightly larger on a S5. The manifolds, I know, are different.

 

No, there was a discussion already. About s4 and s5 turbo, and someone measured it out. There both the same. If I can find it, i'll put a link to it.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/gains-swapping-s5-turbo-onto-s4-847897/

^^ There you go style, third post down. 1.0 a/r, on both hot sides of s4 or s5.

 

huh my bad, good to have some real data on that then.

 

ok so what else will i need to turbo my n/a if i buy the mani sorry this is all new to me i plan on getting haltec so ecu is taken care of

 

Look up Aaron Cake's extensively documented Project Tina (TII-NA), which have loaded of detailed discussion and photographs. First, stickied thread in the 2nd Gen Archives section, first post, has many links to this and other projects documented here on the board - should give you a couple days solid of reading

https://www.rx7club.com/2nd-gen-archive-72/2nd-gen-projects-thread-608165/

IIRC, Aaron Cake (a mod on this 2nd gen-forum) also posted recently something to the effect that the Japan2LA modified manifold just adapts a 4-port turbo manifold so it can mount on a 6 port NA, but doesn't have the runners to feed the 5-6ports - so for a true 6 port turbo, you need to modify a 6port na mani, and/or custom fab an exhaust manifold to allow the turbo to clear the 6 port intake. Or option C, which Aaron Cake did, custom fab an entire intake.

 

searchy search.

http://www.aaroncake.net/rx-7/projecttina/index.html is a good site for converting N/A to turbo. I'm pretty sure most agree that you will be much better off swapping for TII parts than doing custom work to turbo an N/A

also look at rotaryressurection.com - there are some good write ups there as well.

good luck!

 

So many ways to turbo, just choose one.

 

my failure wasnt paying attention to my words there, thanks for correcting me. I ment the same harness.

 

Sorry if I sounded like a douche. Didn't mean to. But s4 owners have to do a little rewiring if using t2 ecu. While s5 owners are plug and play. Besides 2 wires from the engine harness.

 

o its all good dawg. I want him to get good info. It was my mistake, lol