[67RS502]

I've been going with Dave (sheetmetal) to the track, to help him tweak/tune his 67chevelle.
And thought I'd post here to show everyone how well his mild combo is running in a heavy car.

67Chevelle (glasshood)
3520lbs after manual gearbox & Willwood disc br.

383 - dynoed @ 525hp@6200, 500tq@5000
10.8:1
HP950
Super Victor
AFR heads - 210cc, 2.05/1.60 after porting by Greg Good (315/230cfm)
Comp hyd. roller 242/248 cam with 1.5s
1 3/4"hdrs
Full 3" exhaust with X-pipe, big Straightline mufflers - its quiet!
ATI 8"
TH350
410s

So far the best passes have been:
(first time out it was in the 7.36@93 range)
7.13@96 is his quickest (3620lbs)
7.15@97 is his fastest (3520lbs)
(roll bar coming soon)

That equals - 11.teen now, but we're shootin for 10.90 (or better) w/tuning in good/cool weather
later this yr, since in the evenings its 80+ with humidity in the 90% range and its been gettin worse. [img]graemlins/sad.gif[/img]
Now Dave's been griping that us "dumb rednecks" cant get it to go any quicker - we'll see about that!
I told him to wait till the weather starts to come around and I guarantee that 10.90 (or better) slip!
We also have a "bunch" of thing/parts/tuning/tweakin left to do, since its a new combo, only been
out about 4-5 times. Not bad for a heavy mellow street car Dave, people have already walked up
askin "wheres the bottle at?" or "oh its a small block". [img]graemlins/clonk.gif[/img]
Some future mods could be:
more rpms
1.6 rockers
intake swap
intake porting
custom cam
better heads

Just thought I'd post his accomplishment here, and let people see that you dont need a big solid
roller or 15:1 comp. to run good in a street ride, the car is pretty quiet and streetable. [img]graemlins/thumbsup.gif[/img]

[40Coupe]

Dave and I chatted last night about things. No doubt, cooler weather, AND an RPM dual plane and 10.90's are for the takin'.

You've got the HP and MPH now it's all about 60-foots.

Good work Dave!

[DragRacer]

67RS502,

Given the RPM limit of Dave's engine with the Hyd. Roller and the excellent heads, I would be inclined to go with some 1.6 rockers if the springs will take it and go with a Performer RPM Air Gap. He's definitely haulin' for a pretty mild combo.

Garret,

Go get those heads ported and you are sub-7.00 too. [img]graemlins/thumbsup.gif[/img]

How's the other project coming?

[40Coupe]

Jason,
I hear ya. Just drop a check to 1940 Chevy Lane,.....

Seriously though. The only thing that explains Dave's excellent performance is his excellently prepared heads.

[67RS502]

Yea, we'll do the 1.6s (I think he has a set) down the road.
His heads aint bad, but we may step up to some better ones later.
Hey, Garret - if he goes 10.90s with the RPM, then 10.80-10.70s
should be easy with the Super Victor - right. [img]tongue.gif[/img]

[BigRed-L72]

Nice!
What are the shift points? trap rpm?
[img]graemlins/thumbsup.gif[/img]

[67RS502]

Shift points are right on the rev limiter - 6400, but we'll be workin
on raisin them!
Trap rpm? I'm still waitin on that! I've been beggin him to do the roll bar
already, so we can really see the difference in tuning and parts swappin
in the full 1/4, since the 1/8 mile doesnt really tell you if the engine is
makin more power, I'll keep trying. Also his tach wasnt workin well,
(gettin a play-back) so he's shiftin just before or on the limiter.
I've been trying to talk him into makin one full pass before heading
home (last pass), we'll see.

Red, whats your 1/8 mile times/mph?

[JOHN WILSON]

Originally posted by 67RS502:

Hey, Garret - if he goes 10.90s with the RPM, then 10.80-10.70s
should be easy with the Super Victor - right. [img]tongue.gif[/img]

AW HELL, its on now!

[Drag Fabricator]

This car is running into the 10.70's with this season's changes.....and it's STILL running an RPM intake, turning 122+mph

Still leaving off the footbrake, and its lighter and turning more RPM's then Dave's car.

Dave's engine is definetly making Very good power, but my thinking is that it will be quicker with the RPM manifold considering the RPM range and weight of the car.

[40Coupe]

Originally posted by 67RS502:
Yea, we'll do the 1.6s (I think he has a set) down the road.
His heads aint bad, but we may step up to some better ones later.
Hey, Garret - if he goes 10.90s with the RPM, then 10.80-10.70s
should be easy with the Super Victor - right. [img]tongue.gif[/img]

Now who's stirring the pot? The proof is in the pudding. If the car picks up with the RPM there will be no going back to the Super Vic.

Besides, leaving hard is what drag racing is all about. You definitely ain't leavin' harder with a Super Vic. If Dave can show me quicker 60-foots with a Super Vic vs. an RPM in controlled A-B-A testing then I've got $100 check in the mail......

[BigRed-L72]

[QUOTE]Originally posted by 67RS502:

Red, whats your 1/8 mile times/mph?

7.538 ET @ 95.01 MPH

[Canadian_Hot_Rodder]

Quoted by 67RS502

Some future mods could be:
more rpms
1.6 rockers
intake swap
intake porting
custom cam
better heads

How much better can the heads get? What kind/brand? 18*?

[67RS502]

What can I say Garret, I like my single planes and hyd. rollers Sometimes the pot needs a little stirrin - its good to get an intersting topic going, as long as we all behave
everyone has their opinion, hopefully we can get some more real world testing, thats the only reason I'd like to see the RPM on there.
I do believe that Daves car could 60ft a bit better, but its already good. May even et better in the 1/8, but in the 1/4 mile I still think a good single plane will shime on his combo, but not on every combo. I just think hes reached the point where a single plane will work better. I'll also do some port work on the Super Victor, so I think I can get him 1tenth/1mph.

Thanks Red, I wanted to compare the mph, since yours mph's well. Looks like Dave should be around 121mph now, so in good weather with tweakin 122-123 should be do-able.
Canadian
No he's not planning on 18deg, but later we're thinkin well ported Pro Action 23deg heads would pick him up a bit, but I'm still doing some research there. (flow #s aint everything) we're lookin at startin out with a better (casting) designed head to begin with, then some good port work. [img]graemlins/thumbsup.gif[/img] but that down the raod.

[Drag Fabricator]

In a Normally Aspirated car, What you loose in the front half you cant make up on the top end, ask Any Stock/Super stock, Comp eliminator, Pro Stock racer who will give you a straight answer.

You're working with a Heavy, N/A, Street car,
60ft is Everything, the goal should be to improve that.


The more testing done with the car, the more this will become apparent.


Garrents car more then makes that point, look at his Mild engine combo turning a best of 7.15 BECAUSE of the low 1.5 60ft times.

[sheetmetal]

my puter is down but will make an effort to keep you all posted. actully yhe heads flow 298/226 at .600. they still pick up a tad a .700 but my cams not that big. also i have yhe 1.6/1.5 rockers now. seems the tach was on the fritz so i sent it back and am upgrading to a "ultamite" play back. going througt the traps 1/8 mile at about 5700. i just finished porting a RPM intake to try. NOW! Guys "PLEASE" enough bickering about intakes. everyone can go to bed and rest well in this fact. i "will" find the best intake for THIS engine. i dont know what it will be nor do i care what it ends up. im not out to prove anyone right or wrong. just trying to find out what works best. Dave