Better yet, Y not put S5 NA rotors in a S5 turbo engine?

I've heard of it being done, but I've never actually seen it in person.

I've heard of it being done, but I've never actually seen it in person.[/quote]

I want something powerful with good revability not to much turbo lag and reliable somthing that could be driven daily thats why i was thinking s4 rotors b/c .4 compression up i wouldn't have to run as much boost and with a smaller turbo i could have less turbo lag right?

all this is is to try and get the perfect 350+hp daily driver

I've heard of it being done, but I've never actually seen it in person.[/quote]

I want something powerful with good revability not to much turbo lag and reliable somthing that could be driven daily thats why i was thinking s4 rotors b/c .4 compression up i wouldn't have to run as much boost and with a smaller turbo i could have less turbo lag right?

all this is is to try and get the perfect 350+hp daily driver[/quote]

The stock 9.0 is pretty good. If you're after 350 HP you could go for a smaller turbo that would spool up very quickly. Some examples would be a To4B, 60-1 Hi-fi. If you're interested I have a TO4B with a manifold. All it needs is a bearing housing--about $85 from Turbonetics.

OK, here's my dream engine:

S5 street ported turbo block w/ 2 stroke oil pump

S5 NA 9.7 rotors

FD corner seals and water seals

Hurley 2mm 2pc seals, maybe 3mm

FD intake

haltech

t04

1600 cc secondaries



Don't know if it would work but then again it is a "dream"

so when you say that the stock 9.0 is pretty good do you mean that i could make 350+hp with that and a smaller turbo or that it is pretty good in general.



that's some dream Okie. what about fuel management (new pump fpr and stuph and maybe some bigger coil packs i know that the rx-7 packs ae already good but you can always go bigger



as for boosting an n/a in this months issue of SportCompactCar they turboed a toyota matrix which has a 11.5:1 compression ratio stock :o

i figure if they can do it so can I. :bigok:

You can make alot of power with the 9.0 . I wouldn't suggest 9.7 unless you're willing to accept some tuning mistakes. https://www.nopistons.com/forums/pub...>/rolleyes.gif

All 89-91 TII's, as well as FD's, have 9.0. They're all able to make 400 HP easily with a moderately sized turbo. You can actually get close to 350 HP just by upgrading the stock TII turbo, but it will still require all of the other appropriate mods.

well lets start off by saying that you can run any compression ratio with a turbo. now that i said that the higher your compression and the more you boost the better your tuning has to be and the higher octane fuel you have to run, if not detonation will occur.



top fuel dragsters run 12:1 compression with 9lbs tp 12lbs of boost but they have reinforced internals and they run alcohol which cools the intake and combustion temps. since we have rotors we have only a few things we can do to reinforce the motor 1) of course is 3mm apex seals 2) is to pin the rotor housings which helps with high boost and detonation.



now all that being said i wouldn't recommend using high comp rotors with a turbo setup unless you got the money to be rebuilding the motor every few months. yeah it will make a bit more power and help you cut the lag down but if what you want is reliability then stick with the low comp rotors unless your a good tuner and you have dyno with a wide band oxygen sensor for rich and lean readings

so i take it that the best way to be a daily driven 350+ street demon is to do a TII conversion and upgrade: seals, turbo, fuel system, tranny, diff, etc...



but if i wanted to race i could put in high comp rotors... maybe when i when the lottery https://www.nopistons.com/forums/pub...1047683785.gif