PDA

View Full Version : power valve and jets

@wot
10-05-2006, 06:49 PM
On a previous thread, someone stated that plugging the power valve on the secondary side of a Holley 4150, and increasing the jet size to 84 was a good setup. Has anyone tried this on a street driven car? Any plug fouling?
Chevy454
10-05-2006, 06:59 PM
That's how I set up all of our Holleys, and no problems here...fyi, I run a 6.5 pv in the front, and a plug in the rear...I think I'm actually at 82 on the rears on our Y-Nova, which has a little less compression than our Camaro...
YENKO DEUCE REGISTRY
10-05-2006, 07:00 PM
I've tried it, I got fouled plugs - but nothing some high rpm shifts couldn't cure. I'm not sure it really helped me any... but I like to experiment... (with the car, not like a demo-clinton http://www.yenko.net/ubbthreads/images/graemlins/grin.gif )
Chevy454
10-05-2006, 07:05 PM
May partly depend on plug heat range as well...or, the difference could be a big block vs. a small block! http://www.yenko.net/ubbthreads/images/graemlins/grin.gif
rsatz28
10-05-2006, 08:08 PM
[ QUOTE ]
and a plug in the rear...

[/ QUOTE ]

What size and type of plug is used?
@wot
10-05-2006, 08:18 PM
Holley makes a plug that looks like a power valve that plugs the enrichment circuit, probably less than $5.
YENKO DEUCE REGISTRY
10-05-2006, 09:34 PM
Actually, I think you are right about the plug heat range, with the R43's they foul, with R45's they don't. When it's just idling from box to the show it tends to build up, then a few runs down the 1320 and it's all 'clean' http://www.yenko.net/ubbthreads/images/graemlins/grin.gif
Salvatore
10-05-2006, 10:02 PM
Wait a minute M. You don't take that Deuce to church anymore? Come on! I bet when Benjamin gets it he will run it like Drew runs his Yenko! http://www.yenko.net/ubbthreads/images/graemlins/burnout.gif http://www.yenko.net/ubbthreads/images/graemlins/3gears.gif http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif Besides BBBenny is thinking about making his ex racecar COPO streetable on occasions!! Yea Benny! http://www.yenko.net/ubbthreads/images/graemlins/worship.gif
YENKO DEUCE REGISTRY
10-05-2006, 10:30 PM
Of course I take it to church! It just likes to puff a little black smoke sometimes - church is only 1 mile away so it's not even warmed up by the time we arrive http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

I'm beginning to give up hope of seeing you and your FG Z at The Grove or at E-Town doing some of this:

http://www.yenko.net/ubbthreads/images/graemlins/3gears.gif
Salvatore
10-05-2006, 11:36 PM
Don't give up hope. I am just lazy! But....you never know. http://www.yenko.net/ubbthreads/images/graemlins/grin.gif
@wot
10-06-2006, 05:05 AM
Well, I switched over to a PV plug and rejetted (82s) my L78 this afternoon. Drove to a cruise tonite, and, on the way home, did some light to light testing against my friend in his 1969 350/350 vette. My car pulled extremely strong. Got home and pulled one plug, looked great. I'll probably wait a couple of weeks before completely endorsing this setup. Thnaks all for the info.
YENKO DEUCE REGISTRY
10-06-2006, 05:12 PM
How's 3rd gear? That's where I noticed the biggest change when I went to the 'plug' - it pull's like monster truck, just keep the tires under it http://www.yenko.net/ubbthreads/images/graemlins/grin.gif
@wot
10-06-2006, 05:19 PM
My car has a TH 400, and 2nd and 3rd pulled real hard. I didn't have the room to let 3rd gear go too long. But so far I ike the way its running.