RX7Club.com - Mazda RX7 Forum

RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)
-   Race Car Tech (https://www.rx7club.com/race-car-tech-103/)
-   -   engine combo (https://www.rx7club.com/race-car-tech-103/engine-combo-712988/)

boostedte37 Dec 14, 2007 01:09 PM

engine combo
 
looking to build a 200hp autocross engine, I have done the searches but not many direct answers.

I am staying away from turbo and efi want to keep it simple. My thoughts were BP and 48 IDA. Good idea or bad idea?

justint5387 Dec 14, 2007 01:46 PM


Originally Posted by boostedte37 (Post 7624826)
looking to build a 200hp autocross engine, I have done the searches but not many direct answers.

I am staying away from turbo and efi want to keep it simple. My thoughts were BP and 48 IDA. Good idea or bad idea?

What car and what class?

boostedte37 Dec 14, 2007 02:07 PM

914 probably XP

wrankin Dec 15, 2007 11:23 AM

I wouldn't think that you need to go as far as a BP - a good street port maybe. I know that the club racing folks are getting up to 175 rwhp out of an S5 NA motor with stock ports and internals.

Good luck,

-bill

Don49 Dec 15, 2007 12:14 PM

A good street port and 48IDA should net you 200 rwhp. This is assuming 3" exhaust and good ignition, properly jetted carb etc.

boostedte37 Dec 15, 2007 04:33 PM

thanks for the replys' fella's yeah I think a good SP would be better for my application:icon_tup:

boostedte37 Dec 15, 2007 04:34 PM


Originally Posted by Don49 (Post 7627925)
A good street port and 48IDA should net you 200 rwhp. This is assuming 3" exhaust and good ignition, properly jetted carb etc.

what do you consider good ignition:Wconfused

boostedte37 Dec 17, 2007 11:22 PM

dumb question I guess:uhh:

Boswoj Dec 18, 2007 01:01 AM

Unless it is stretched to the limit, a streetport and IDA isn't usually going to make 200 hp. Top National EP cars are making that, and even a bit more, but most big streeetports are making more like 170, maybe 180 without some serious dyno work and optimization.

Don49 Dec 18, 2007 09:55 AM

I have an MSD 6al on my E Prod 2nd gen. It is a fully prepped National level car.

Rotaryhaven Dec 18, 2007 09:58 AM

where are you located at?

boostedte37 Dec 18, 2007 06:50 PM


Originally Posted by Rotaryhaven (Post 7637333)
where are you located at?

Ms, SCCA Delta Region



Unless it is stretched to the limit, a streetport and IDA isn't usually going to make 200 hp. Top National EP cars are making that, and even a bit more, but most big streeetports are making more like 170, maybe 180 without some serious dyno work and optimization.
I can live with 170-180 my car is going to weigh between 1600 and 1650....

I am using a SP'ed turbo II with na rotars and a Holley 650 2barrel


All times are GMT -5. The time now is 09:50 AM.


© 2026 MH Sub I, LLC dba Internet Brands