[Skip Fix]

With some sticky tires should be a fun track car.

[tom s]

I got the subframe connectors in,the Konis came yesterday,getting ready to order tires and wheels,need to get a shoulder belt system in it.Hope the 8.2 does not break.Joe said my hemi NASCAR holley with lemans bowls made as much HP as his dyno carbs.Doubt I will get my chit together before it gets too hot to go to Fontana road course.Tom

[Steve C.]

Tom,
What series are you going to run in ?

Of interest here..... but not meant as a omen


https://www.youtube.com/watch?v=P_wFAdTroac


.

[Tom Vaught]

Originally Posted by tom s

About 5 years ago I built a pretty stock 455 pump gas engine for my Judge.455,9.5C,completely stock 48 heads except springs and 1 pc valves.I used a XE276HR on a 110 as I had it in my drawer.We ran a stock AL SD intake with Joe Shermans dyno carb and custom 2in Tyree 4 tube headers.The engine made 432 HP at 5200.That cam was [email protected] ran 1.65 H&S rockers.I put Daves new Stump Puller II in the engine with exact same intake and carb put replaced the 1.65s with 1.50s to keep the lift virtually the same.Because I wanted to know the performance as it will be in the car I used long branch 2 1/4 exhaust to about 2 ft of 2 1/2 pipe into Joes dyno mufflers.The engine made virtually the same HP 234 but at 5400.Joe figures we gave up about 15-20 HP with exhaust from the 4 tubes.We also ran no spacers as I cant run one with the 69 T/A RA pans.This cam was on a 112 put in at 107.He is going to pump it.FWIW,Tom

Assume the new engine 234 HP number posted above is a old F*arts issue and should be near the 432 HP mentioned earlier with the previous camshaft.

Tom V.

[Tom Vaught]

I would sweep the camshaft position and find the sweet spot that the engine likes vs what people assume as the parts have never really been tested on a basic #48 head with no porting that if lucky might go 205 cfm. Stock RA-IV would be 220 assuming 25" of head testing pressure on the flow bench.

Tom V.

[tom s]

Steve,just track days,no racing!Old farts driving!Tom

[tom s]

this is the last pull,Joe backed it 3 degrees(one crank keyway)Lowered the pumping 6-7 lb.He started the pulls at 36 and kept retarding till he ended with 31 degrees with no loss of power?Joe said we left a lot of HP on the table with castiron exhaust,no spacer on the HSD intake and no 1.65 rockers.It liked my 850 NASCAR Vac sec Holley.

[72LuxuryLeMansLa.]

Originally Posted by tom s

I got the subframe connectors in,the Konis came yesterday,getting ready to order tires and wheels,need to get a shoulder belt system in it.Hope the 8.2 does not break.Joe said my hemi NASCAR holley with lemans bowls made as much HP as his dyno carbs.Doubt I will get my chit together before it gets too hot to go to Fontana road course.Tom

Tom,
All I know about road racing is that I love to watch it. So I'm wondering what you use for braking. I'd imagine the stock system wont hold up on the track.

[tom s]

The car has Baeir on the front and stock drums on the rear.Im going to get the complete system checked out before I hit the track.As I said before im not going to race other cars,just me and the clock.They have track day where you get I believe 20 min at a time on the track.Tom

[Formulajones]

Originally Posted by tom s

The car has Baeir on the front and stock drums on the rear.Im going to get the complete system checked out before I hit the track.As I said before im not going to race other cars,just me and the clock.They have track day where you get I believe 20 min at a time on the track.Tom

That sounds like fun.

Power curve looks nice, flat down low and holds on pretty good up top too.

[Skip Fix]

Tom Porterfield has some improved compound drum shoes.

[tom s]

The engine with the SPII made 434 and not 234 with the dual plane.Fat fingered.Joe made 12 pulls on the engine.Best number was 449.3HP@5800 with the HSD.Tom

[Will]

Those are some nice numbers for stock heads and manifolds.

Just wondering what it might do with some 290cfm KREs. The exhaust would be the choke point for sure with those but it would tell us if the current heads are holding it back. When I win the megamillions I'll buy you a set of heads if you'll dyno test them back to back... ;-)


is there any way you can get any kind of spacer under the carb? Even a 1/2" would probably help.

[tom s]

I did that engine but with the road paver cam.It made just under 600 with a 2-4 setup on it.If I can find it I will PM it to you.Tom

[tom s]

On its way Will.Tom

[Skip Fix]

Those FAST guys massage the heck out of factory exhaust manifolds! Gessler used to do a lot of my Buick buddies manifolds and I think he does Pontiac manifolds.

[tom s]

And the intakes!Tom

[PAUL K]

I think Greg retired a couple of years ago.

[Will]

Originally Posted by tom s

On its way Will.Tom

Thanks Tom! Read through the post you sent and don't see anything abut iron manifolds and it was a considerably larger cam.

I'm just curious about the particular combo in this post, especially the stump puller with iron manifolds. Would the engine pick up significantly if you changed the heads and nothing else, or is the exhaust choking it too much?

[tom s]

The heads would help some for sure,the cam IMO is small for 455 and 290 CFM.Tom