No offense to all you boost freaks, but Im trying to stay away from turboing my car.

My car is an 85 GSLSE with 9.4:1 compression rotors, as per racing beat. The series 5 rotors have a 9.7:1 compression. Along with higher compression, 2 extra injectors and a few tweaks, the series 5 develop 160 hp compared to 135 hp of my car.

I was just wondering if it would be worth it to switch rotors and maybe housings. To gain a few extra horses.

My goal is to leave the engine looking as stock as possible, while making around 200 hp.

Now, does this seem feasible. Or am I just waisting my time.

Thanks.

pAcO

If your looking to gain Hp without going turbo and you dont mind your car being loud then i would port your motor

Sounds like a plan. It will work ok, but you'll need both the 89-91 front and rear counterweights to go along with the rotors.

what about big street port while its apart !!!! https://www.nopistons.com/forums/pub...IR#>/devil.gif

Opps, did i forget to mention porting was involved too. I just figured that if I got a higher compression then my ports wouldnt need be too big. That way I could stay a tad on the quite side. Also, if I was to keep my stock efi unit, would i be able to go with 12A front and rear covers, to make the car 4 port. Are 4 ports better than 6 ports as far as porting is concerned? Id like to have a somewhat quite car, that wont attract a lot of attention. So will the 6 port or 4 port be quieter?



Also, would I be saving myself a lot of headaches if i found a good, say, series 5 engine and just worked that one and then just swap the front cover and install it on my car?? Is there any external differences between the series 5 and series 3 13B?

Like I mentioned before. Id like my to look as stock as possible when I open the hood and ppl look at it.outside.



Sorry, for all the questions. Its just that id like to get all the possibilities out in the open before I start my littel project.

Thanks

Opps, did i forget to mention porting was involved too. I just figured that if I got a higher compression then my ports wouldnt need be too big. That way I could stay a tad on the quite side. Also, if I was to keep my stock efi unit, would i be able to go with 12A front and rear covers, to make the car 4 port. Are 4 ports better than 6 ports as far as porting is concerned? Id like to have a somewhat quite car, that wont attract a lot of attention. So will the 6 port or 4 port be quieter?



Also, would I be saving myself a lot of headaches if i found a good, say, series 5 engine and just worked that one and then just swap the front cover and install it on my car?? Is there any external differences between the series 5 and series 3 13B?

Like I mentioned before. Id like my to look as stock as possible when I open the hood and ppl look at it.outside.



Sorry, for all the questions. Its just that id like to get all the possibilities out in the open before I start my littel project.

Thanks[/quote]

Your motor is essentially the same as an 86-88 13B. The 89-91 will swap in without much trouble. Porting the exhaust will make the motor loud. You can't port the 2nd gen NA rotor housings very much, but one option is to use TII rotor housings.