[69Goat1]

I have a friend that says he has never seen or heard of a hydraulic roller cam in a Pontiac that has gone faster than an 11.4 1/4 mile - surely someone has!

[slowbird]

If we can run 10.1 with a hyd flat tappet. It should be pretty easy to run better than a 11.4 with a hyd. roller. I believe P-dude has ran 10 something with his hyd. roller 505

[Half-Inch Stud]

I uhm...DARN it was 11.0 with a HYD Flat-Tappet & iron heads.

[bad69bird]

Jeff Kinsler ran 10.0's with a hyd. roller I believe.

[Bill Meyer]

Route 66 Pontiac event 1999 My GT37 ran 10.72@129 474, 197 Round port heads, victor, BG goldclaw 850, HR 254/254
607Hp @ 6100 - great engine - too bad I used stock rods!! Put a rod thru the side of the block.

[Bud Lyons]

10.52 @ 127. Custom hyd roller from Pdude.

[69Goat1]

Keep em coming - sounds like it can be done!

[77TA]

Those running Quicker than 11.4 please give more car info. I see one is .505 cid . What about weisht ¿ I am the 1 that questioned the value of a hyd roller vrs a flat tappet based on what I have seen.

Thanks

[Cliff R]

We logged several 11.50 runs last summer, in 90 degree and hotter air with the humdity off the scale! We tried to run in cooler air but annialated the tires all the way thru first gear. The MPH was over 118, with near 2.0 60' times, still went 11.70. By me best estimates it would have easily went 11.30's with a 1.6 60'. I'll try to get some runs in this spring, with some new tires before temps get really hot around here.

One of my customers runs a near identical combo as mine, 455, KRE "D" ports, RPM intake, in the same body style car, about 100lbs lighter race weight. He's went 11 teens thus far with a small HR cam.

We run a pretty small HR cam, really liking it so far.......Cliff

[PONTIAC DUDE]

Been 10.50's with a hyd roller and in a 3600lb street car with a Powerglide. 3.55 gears. Stock suspension and best rpm at only 6000. That was 2 years ago!!!!!!!!!

Pump gas..............


My 505 625hp hydraulic roller engine combo is guaranteed to run 10's............ on pump gas........... in a decent street car.


Stayed tuned. Gonna see a 9 second street car, Pump gas with a hyd roller. 93 octane too. N/A........

http://www.angelfire.com/fl4/pontiac...8/CV1head.html

[77TA]

To add to the question. Has anyone ran better with street car >3600lbs with a hyd roller with 240 degrees @.50. I have seen several flat hyd cam
guys post those type results. I am not trying to say the HR is not better in allot of ways but if a guy was tight on cash could he run as well or better at the track with a flat tappet.

[PONTIAC DUDE]

Originally Posted by 77TA_2

To add to the question. Has anyone ran better with street car >3600lbs with a hyd roller with 240 degrees @.50. I have seen several flat hyd cam
guys post those type results. I am not trying to say the HR is not better in allot of ways but if a guy was tight on cash could he run as well or better at the track with a flat tappet.

Huh> If your that tight for the few dollars more trying to build a 10 second car.....????????????????????


FWIW: Remember that was with a 3200 tight nitrous converter. Powerglide. Actual weight was 3595 lbs. Stock type leaf suspension, stock front suspension. DOT Radial tires............... no slicks.
and set up for Nitrous. It was NOT a max combo. Used Out of the BOX basic E-heads flowing 300 cfm (port cleanup with back cut valves) with a 1.77 exh valve. Port matched Victor intake. 10.50-1 compression....PUMP GAS
No trick engine stuff. 3.55 gear. Ya gotta look at the whole picture. Maybe low 10's?

And only one weekend of playing at the track. Then the chassis dyno. David Holmberg was there for verification as to the combo and REV Extreme in Tampa for the use of their Chassis dyno.


Pulled it and went to the 428 cu.in. ATI Procharger

Stay tuned.

Gonna do the same combo with the CV-1 heads (out of the box, no port work) on pump gas. 9's ??????????

[77TA]

DUDE the 10.50-was that with one of your 505 cid engines

[PONTIAC DUDE]

Originally Posted by 77TA_2

DUDE the 10.50-was that with one of your 505 cid engines

Actually was my 530 with a Moldex 75 lb boat anchor crank at that time. LOL.
Warped (Alex) knows the crank. It had been thru H*ll before i got it.
4.350 bore with a 4.46 crank stroke. Out of Butlers car in the mid 90's.

But have built 4 of those 505's with the same cam & head combo. One dude was 10.90's first time out in a basic stock GTO.

[77TA]

Neat, My question really surrounds weather or not someone who is watching what they are spending may be better served putting the 500 or more dollars they will spend on a hyd roller toward either and flat hyd or flat solid if low street miles are in the future and max strip performance is the Idea for the least cost. I have seen lots of people post 10 second or 11.0 range ET with flat Hyd and even quicker still with Flat Solids... I just have seen a hyd roller cammed stock block car really show an advantage... Just an example is Skip Fix UD 239/246 running 10.99@124 mph flat tappet cam... Anyone running a similar hyd roller to those speeds... I am looking... The math and the computer dyno seems to indicate the hyd roller should have more potential.. I am just not seeing real life examples... To me you take a flat tappet cam in the 250-260 range and its going to run 10's in cars like some have mentioned just like the hyd roller...The hyd roller is nice and has factors other than power that make it a good choice no question I just have reservations and questions about the technology being better from a power persective to a flat tappet for the money.

[PONTIAC DUDE]

But find out what all Skip has done to that engine/car to get there compared to a basic throw together combo that just runs into the 10's without all that science stuff and chasin a tuneup.

Bolt it in and go.
Pontiac people for too long have had to chase every freakin little detail and still couldn't ouitrun a BBC. Had to pick and compare there iron the SBC's.

Why not run out of the box parts, never have to check or adjust valves, no cam break-in, no cam to possible wipe out then blame the manufacture or somebody else. 10's pump gas, drive anywhere, not just weekends. The list goes on.



Maybe I'll change my signature after I get my hot rod done to.............

9 seconds. Throw it together, Out of the box, no science to it, 93 octane Stock suspension Street car

Oh......... and don't forget. FULL exhaust!!!!!!!!!!! Stay tuned.

LOL.

[02Hawk]

I ran 11.2's all last summer with a 468 4.25 stroke, e-heads in a Hyd roller set up. The cam was 236/ 245 with .600 lift. 70 GTO race weight 3600lbs. 3.73 rear with a Th400 at 2300 altitude witha D/A of over 3500 ft indicated.

Dave Bischop @ SD is building me a 541 with a hyd roller set up that should be in the low tens. IA2 with 330cfm E- heads. 4.5 stroke witha 4.375 bore.
Cam will be 260 plus with the same lift (.600). 114 degrees
Don't want to say more than this yet as we need some dyno time but we are shooting for 650 HP and 700 lbs tourque

Shawn (slgenge) I and (chuckies) Charlie are going to visit Dave and Marcel this weekend to pick up Shawn's 428 and will post pics

[MrPushrod]

My car should do around 11.50's at sea level on the motor.....
.Hyd. flat tapp.(comp 294) 670 dport heads.

[Skip Fix]

The "special" things on my combo- CNC 320cfm porting on the E heads by KRE but still uses 2.11/1.66 valves. Coated valve springs. So not out of the box E heads but similar to what any consumer can get.

Torker II had to have the top of the ports welded to seal the KRE port job. Some time blending the tops and width back into the intake using snap gauges to be sure not narrower up higher. NO plenum or plenum entrance work. Out of the box Holley 4781 with jet extensions and no PV in the back and a 30cc pump on the back(to compare to the Demon 850).

Ross 20cc dish pistons tops and skirts coated. Standard Ross pins.

I tried a number of rockers on the dyno HS 1.5s, HS 1.65s, then the Crower 1.8s just on the intake. a few more HP with the 1.8s over the 1.65s all across.

Continental 10" Hand convertor. Tri City rear leaf springs, TRW 6 cylinder front springs and Bilstein shocks all around.

That's all the tricks! Defintiely easy to copy.

One big advantage to the HR I do see is cam break in and lobe survival(if the link bars don't break). I had the advantage of 1.33 break in rockers, EOS and Valvoline racing oil. The disadvantage of having to pull the valley pan , but saw the cam looked good. To eliminate that chance the HR is sure something I would consider for the future for another motor.

[69Goat1]

So - I guess the question has been answered - a person can run quicker than an 11.4 in a greater than 3600 lb car with a HR. Sorry Dewayne Nobody said anything about cost because lots of guys are going HR just because they don't want cam lobe failure.



BTW - This is my thread and I am curious as well since I see a HR in my future!