Re: removing the secondaries a compelling story
 

Ok pics are back up. I should have the car back this weekend. :pray

Re: removing the secondaries a compelling story
 

:cheers::dancing:mrgreen:

Re: removing the secondaries a compelling story
 

Great News, Daryll!!

Re: removing the secondaries a compelling story
 

Yep I am so..... Ready

Just installed a radiator today on my POPs 96CE and put his new front a rear CE emblems on. Took the day off bonding with tools always fun.

Re: removing the secondaries a compelling story
 

Cost = gain? Yep, that IS the question. AND, education cost $$ too! How does $100+/rwhp sound? That's assuming YOU do the engine pull and reinstallment. - Like I said education ain't free neither!;)

My heads had to come off anyway, due to a valve problem. (I believe was there when I bought the car, possibly due to a bad injector.) I love the power the porting bought me - I love it - don't get me wrong. BUT, IF you're not racing, 400+ rwhp ain't too shabby at all, and enough to get the attention of all contemporary Vettes except the "Zs"...NOT too shabby at all for a little DIY plenum and IH porting + exhaust system! And, my biggest "seat of the pants" boost came at that point; a 60+rwhp lift for porting the plenum and IHs and installing the exhaust. The additional 26-30 for the heads was just the cherry on top, but the BIG bucks was in the heads, as the engine has to come out, the porting (not for the fient fo heart) has to be done, the cams timed, gaskets, etc, etc, pressure tested and repaired as needed...

P.

Re: removing the secondaries a compelling story
 

Yes, the work to port the heads is labor intensive
and therefore either $$$ and/or a PITA. But,
If I read the thread correctly, the question was
is it worth it to open up (port) the Throttle Body?
See post #23.
That's another issue. Waiting for opinions........

:dontknow::happy1:

Then see post #26. I think Marc H. was mis-quoted.
He probably said there wasn't much gain porting the
throttle body, but porting the heads is beneficial.

Re: removing the secondaries a compelling story
 

From all the folks I talked to the short answer was no not really. Possible gain if you are going the stroker route but if just top end porting with no stroker action below no was the uninamious response. I went with no reguardless It wasnt worth it to me unless there was significant gain.

Re: removing the secondaries a compelling story
 

I recently had this conversation with Marc. If I recall correctly, he felt the 63mm TB was worth ≈ 6 or possibly 8 hp, ± on a stock block.

I was thinking it would make more difference than that. The fully ported top end increases area of the runners by approx 19%. Coincidently, increasing the TB from 58 to 63 mm is also approx 19%.

Well, physics is an interesting study, in that flow and pressure and resistance, are terms that can be translated into electrical properties; i.e., Amperes, volts, resistance...for example.

Curious what would happen in electronics if a similar model were built, I set up a series circuit with two resistors; one representing the TB, and the other representing the rest of the ported top end. And, for a benchmark, I used the power gain of my motor having been fully ported except for the stock TB. Then I reduced the resistance value of the TB by 19% to see what the difference in power would be. Coincidently(?)...the answer was 6 hp!!!

I'm not drawing any hard won conclusions, but it was a bit of a surprise, if nothing else... Sure would like to have a dyno day and a pair of TBs; one stock and one ported and swap 'em back and forth a few times to see.

Just a thought.

P.

Re: removing the secondaries a compelling story
 

Wow Paul you are the only one I am aware off that has put a hp figure to it

Re: removing the secondaries a compelling story
 

That's a pretty cool ratio calculation- the next question is that if it does anything under the curve before 6000 rpms and if you have stock exhaust manifolds, for instance, will that bottleneck negate any further intake gains.

I guess the tb enlargement might still be left for last- or maybe at the same time you port the heads.