Porting is done...FINALLY!

[Paul Workman]

Pete's balls are free to ream out the next virgin set of plenum/IHs!:mrgreen: Those balls doooo get around, huh?:sign10:

I finished touching up the port matching and initial torquing (will re-torque the IHs this morning). Were it not for the fact the 5/8" freeze plugs I bought (to cap off the secondary bearing ports) turned out to be .040 over, I'd give a fire-up a shot today. But, instead, I guess I'll be relegated to doing some cleaning and maybe some painting (the plenum). I've gotta slap on my new headers and 3" exhaust system, and she'll be ready to terrorize some blacktop...Another addition to the FBI!! Can't wait!!:dancing

P.

[tomtom72]

:cheers::thumbsup:

I hope your "new" toy brings a smile to ya!:mrgreen:

[ZZZZZR1]

Congrats Paul!


Lets see some dyno numbers!


:cheers:


David

[Paul Workman]

Congrats Paul!


Lets see some dyno numbers!


:cheers:


David

U bet! 190 rwhp would be a happy point/interim goal, and anything above that would be gravy! 400 would be:dancing:dancing:dancing!!

I'm hoping my loooong taper into the heads was worth 5 hp. I couldn't see putting out the $475 for a one-time reamer to do just that, so I went the hand route. But, if it works out (the hp), I have the specs if someone wants to have one built - sure make that taper into the heads a LOT easier, there's no doubt in my mind!

I'm considering having Marc do the TB porting as well - as part of the "whole 500 hp package" (heads next winter's project), but doing it now to spread the $$$ over a bit more time. 400+ rwhp would be shweeeeet at this stage!!;)

P.

[Jim Nolan]

Before Aaron at SGC tore mine down I had him Dyno mine. I was putting down 349 hp 348 orq. This with a 375 hp motor and only porting of the plenum, injector housings and air horn. He is now porting the heads, adding headers, resetting the cams plus 3.92 gears and a few other things. I'm hoping to get at or close to 400hp at the wheels. I'll keep you posted.

[jonszr1]

on the hp gain with ported inj housings and plenum. corey henderson did mine. we dynod the car before ,with headers flowmaster exhaust ,fidanza flywheel. before it was 373.3 and after the porting as well as coreys tuning she made 409.9. my car is a 90 .

[GrayZ]

Paul:

congrats on the completion of your project
i'm sure you will love the seat of the pants difference.

Before taking "Oprah" to Marc, with watson headers, marc's chip
my car laid down 349 rwhp. After adding the corsa exhaust and high flow cats i feel she added a nother 8 hp or so.

After my Haibeck, 500 hp package where he ported the top end ( we left the cats on)
and my fidanza. I'm laying down 424 rwhp.

A Couple of things to get used to, this deafening roar at wot
and....the tires breaking losey goosey.

hope you make it to BG.

:thumbsup:

[flyin ryan]

I'm considering having Marc do the TB porting Funny you mentioned that, nobody really talks about TB's when it comes to porting. I just finished porting one a couple days ago.

[LGAFF]

I have always heard no gain from the 63MM TB

[Locobob]

I have always heard no gain from the 63MM TB

Results are iffy at best on a mildly modded 350, gains (if any) will fall within a dynos pull to pull hp variation.

[Polo-1]

Results are iffy at best on a mildly modded 350, gains (if any) will fall within a dynos pull to pull hp variation.


That's because you need a 65mm:wink:

[rkreigh]

I have always heard no gain from the 63MM TB


that is true, even on the strokers. the throttle body isn't the bottleneck.

I do however want to try porting the tiney little primary throttle blade

I do alot of part throttle driving, and I think it starves the engine for air until the secondary on the throttle opens up. this is especially true for me as I don't have any secondary plates in the heads anymore

probably should modify the linkage and just snap the big blades open off the get go!!

any thoughts on that??

[QB93Z]

.......I do however want to try porting the tiney little primary throttle blade

I do alot of part throttle driving, and I think it starves the engine for air until the secondary on the throttle opens up. this is especially true for me as I don't have any secondary plates in the heads anymore

probably should modify the linkage and just snap the big blades open off the get go!!

any thoughts on that??

Maybe I am missing what you are saying. Isn't the point of the throttle valve to throttle the air flow to control engine speed? If you ported the throttle valve to a bigger diameter, the throttle plate would still throttle the air flow to maintain the desired engine speed/load.

Jim

[Locobob]

That's because you need a 65mm:wink:

That stroker crank must have fallen off the shelf and hit you on the head, you should just send it to me before you really hurt yourself. :mrgreen:

[rkreigh]

Maybe I am missing what you are saying. Isn't the point of the throttle valve to throttle the air flow to control engine speed? If you ported the throttle valve to a bigger diameter, the throttle plate would still throttle the air flow to maintain the desired engine speed/load.

Jim


hi jim,

I'm talking about the tiny "primary port" in the throttle body. nobody ever seems to port that. but with the bigger displacement (390), and part throttle, it might help the engine breath better at part throttle openings with just a bit bigger port/plate

when you look at that tiny little port it just doesn't look right!

I've seen EHS modify the secondaries to blend them into one BIG oval shape blade (1 instead of 2) to really open up the flow

but yea, it's probably not worth the effort and cost to do the primary throttle port.:o