588ci P51 N/A Deal Makes 1042hp with 2 inch Tri Y Headers..some more info on combo.

nascar429 wrote:
Lem do you know how much lift you can practically run with the 2.25 valve in the p51 head before you run out of spring in relation to installed height coil bind etc..?

The usual race roller spring I put in the P51 package is the PAC 1224. It should allow at least .850" net lift when installed at 2.00". A guy could jack around with keepers and stuff and get some more.

Thanks Guys..

I Didn't realize .850"lift was possible with those valves with a bit of playing around that's great to know..

IDT-572 wrote:

dfree383 wrote:I’ve just never seen those kind of #’s with a victor and small headers, plus it’s odd seeing it peak at 7100.

From what I can see in the pictures the intake doesn’t look to have heavy external mod’s

I'm not going to say it's not legit, after the bashing's I'v had on my numbers, but an un-modded Victor going to 7100 at 588 inch is going to be very tuff to do.

I saw that too.

Nowhere did I see that it was claimed the Victor manifold was "out of the box".
16:1 CR, big camshaft, big valves etc.. I suspect the manifold was not OTB.

As Randy M has stated previously:

"I have personally run a big bore 588 Ford on the dyno with those heads and a greatly modified Victor manifold, (anyone would have difficulty seeing the mods from the exterior), which peaked horsepower at 7,200 RPM. Not that much, though; (it was just under a 1,000 horsepower)."

The Victor has room to get 4.4 sq inches at plenum tapering to 4 square inches at the gasket flange.
The modified victor was worth 20+ cfm when flow tested on the head (A429). 380+ cfm @ 0.800" with manifold attached.

68galaxie wrote:Nowhere did I see that it was claimed the Victor manifold was "out of the box".
16:1 CR, big camshaft, big valves etc.. I suspect the manifold was not OTB.

As Randy M has stated previously:

"I have personally run a big bore 588 Ford on the dyno with those heads and a greatly modified Victor manifold, (anyone would have difficulty seeing the mods from the exterior), which peaked horsepower at 7,200 RPM. Not that much, though; (it was just under a 1,000 horsepower)."

The Victor has room to get 4.4 sq inches at plenum tapering to 4 square inches at the gasket flange.
The modified victor was worth 20+ cfm when flow tested on the head (A429). 380+ cfm @ 0.800" with manifold attached.

How would you tune the runner length without external mods?

There probably is room for more power output with a "tuned" runner length intake. I will not argue there.

Many of the newer manifold designs have an elongated plenum and runners are nearly the same length.
The Victor and mafia intakes both do not have identical length runners.

I would suspect with a tuned/welded intake he would have made more power.

Lem Evans wrote:

nascar429 wrote:
Lem do you know how much lift you can practically run with the 2.25 valve in the p51 head before you run out of spring in relation to installed height coil bind etc..?

The usual race roller spring I put in the P51 package is the PAC 1224. It should allow at least .850" net lift when installed at 2.00". A guy could jack around with keepers and stuff and get some more.    

I was looking at specs on PAC springs- the PAC 1224 and the PAC 1324 have the same specs-why the price difference? Which is better? Why? Can't get through to their tech dept so I figured I would ask here.

away wrote:

Lem Evans wrote:

nascar429 wrote:
Lem do you know how much lift you can practically run with the 2.25 valve in the p51 head before you run out of spring in relation to installed height coil bind etc..?

The usual race roller spring I put in the P51 package is the PAC 1224. It should allow at least .850" net lift when installed at 2.00". A guy could jack around with keepers and stuff and get some more.    

I was looking at specs on PAC springs- the PAC 1224 and the PAC 1324 have the same specs-why the price difference?  Which is better?  Why? Can't get through to their tech dept so I figured I would ask here.

Surface treatment I suspect......polished or some other jazz.

I talked briefly to the guy who modified the manifold ..it's a $1500 job at least to modify the Victor manifold cut shut welding porting etc..after the manifold and heads were modified (lots of work) he claims to have achieved 440 cfm with the manifold (attached) believe it or not...

Racing is starting soon so hopefully I'll see the car in action and have a good look at the manifold maybe get some pic's..

away wrote:

Lem Evans wrote:

nascar429 wrote:
Lem do you know how much lift you can practically run with the 2.25 valve in the p51 head before you run out of spring in relation to installed height coil bind etc..?

The usual race roller spring I put in the P51 package is the PAC 1224. It should allow at least .850" net lift when installed at 2.00". A guy could jack around with keepers and stuff and get some more.    

I was looking at specs on PAC springs- the PAC 1224 and the PAC 1324 have the same specs-why the price difference?  Which is better?  Why? Can't get through to their tech dept so I figured I would ask here.

This is from their catalog...

1200 - PAC’s standard HP processing without sacrificing performance

1300 - Premium processed with Nano-PeenTM spring technology for enhanced durability and exotic heat treatment for minimal load loss

Well didn't get to see it race had to work, my sister in law sent me a pic of the time it went on one of it's first passes tonight on a test an tune..

8.78 at 155.58 in the Qtr with the new engine combo from the dyno session..

video my sister in law recorded from last night..she is crazy about drag racing..

Of the said engine from this thread in the car on its first meet..we use kilometer (Metric) here that converts to 155.58 miles

those tri y headers used in that car?

Pretty sure there still running the Tri y headers that's what they have run for years.

I'll check it out at the track next time have a good look at the modded manifold and headers..

nascar429 wrote:Pretty sure there still running the Tri y headers that's what they have run for years.

I'll check it out at the track next time have a good look at the modded manifold and headers..

cool

nascar429 wrote:

video my sister in law recorded from last night..she is crazy about drag racing..

Of the said engine from this thread in the car on its first meet..we use kilometer (Metric) here that converts to 155.58 miles

Looked like quite a bit of wheelspin on that pass!!!

Mark Miller wrote:............Looked like quite a bit of wheelspin on that pass!!!

Wheelie bar induced wheel-speed.