[twinturrbo406]

Originally Posted by 65nss4spdGTO

Actually Bill was incorrect in the airflow of these heads. They came in right around 425 CFM. The cost ready to bolt on is $4,595.00. Not inexpensive, but not breaking the bank.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

.... oh damn, now i'm gettin' mixed up with all these ports we got floatin' around, lol ....

[65nss4spdGTO]

Originally Posted by garrity455

Very nice Calvin! Numbers like that put my dads car in 9.5s and doing it on pump gas is awesome!

Thanks.

If I remember correctly, your dads engine dynoed just over 800 HP when we reworked the E -heads on his 505ci engine.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

[pontsd]

Tom , as always thanks for the info. With the extra 70- 80 inches The motor and I was willing to tolerate a little more cam that it might take to build this stout street motor, and it's an auto 3.90 car so it should work out. It idled nice and easy at 900 rpms and the motor did not act like it had that big of a cam. Its all part of the fun and I hope to drive it as much as you drive yours! : ) I want to thank Calvin and Bill for the providing the fun.

[vidguy]

Got good strong numbers hp 813 Tq 726 should be a stout street car

... understatement....
Heck that's twice what some built street cars can boast..

@twinturrbo406 - So you're saying that it'll live well on pump gas?

Do you guys really consider the CV1 heads a street head? How much of the power made from this motor is in the heads?

I never even looked at the CV1 info before figuring they are strictly race. I did a quick search and saw complete pairs for $3000.00.
http://www.rolandracing.com/id17.html
(those transparent valve covers are very, very cool...)
Figuring a complete pair of KRE Dports or Edelbrock heads after porting are in the $2300 ish range that not a WHOLE lot more money for massive performance gains if the numbers are due mostly to these heads.
You need the matching intake but can use standard round port OR D-PORT exhaust? In the end the cost goes up beyond just the heads a bit I suppose..

I would like to know how driving it on the street after a month or two feels. .

[twinturrbo406]

Originally Posted by vidguy

... understatement....
Heck that's twice what some built street cars can boast..

@twinturrbo406 - So you're saying that it'll live well on pump gas?

Do you guys really consider the CV1 heads a street head? How much of the power made from this motor is in the heads?

I never even looked at the CV1 info before figuring they are strictly race. I did a quick search and saw complete pairs for $3000.00.
http://www.rolandracing.com/id17.html
(those transparent valve covers are very, very cool...)
Figuring a complete pair of KRE Dports or Edelbrock heads after porting are in the $2300 ish range that not a WHOLE lot more money for massive performance gains if the numbers are due mostly to these heads.
You need the matching intake but can use standard round port OR D-PORT exhaust? In the end the cost goes up beyond just the heads a bit I suppose..

I would like to know how driving it on the street after a month or two feels. .

..... where the power came from ?? ... well, obviously the induction system as a whole is responsible for the power, but it starts with the heads ..... the carb is a huge part also ...

[twinturrbo406]

... here is a different Dyno-Graph that is a little easier to see ...

[vidguy]

Yep, you'll have fun with that!
Thanks

[Tim Corcoran]

Those are some VERY INPRESSIVE numbers for a pump gas combo. What that many cubes I can see how the cam seems mild and I am sure it is very streetable until you put your foot to the floor and all hell breaks loose. What a monster on the street that would be a fun toy that would melt the rubber off any possible tire on the street. very cool.

[hopper146]

I find it amazing what these big cube motors will take for a cam. I went with a mild solid lifter cam, and it almost idles better than the stock 400...lol. But then again...maybe too mild?..I'm only running 585hp/685tq out of my IAII. Maybe I should step up to a little wilder roller this year.

[grandville455]

That would be one hell of a fun car to drive! man u could barely leave the stop sign without frying them ... Nice numbers!

[ITSBACK]

Id like to pull up next to a new stang or vette with that.

[BruceWilkie]

For comparison...

the cam is very close to what I put in a 528 ford with Kasse p51 heads.(264/272@ .050 110 LSA .767 net lift). Ford had 13.3 compression Ron's toilet on a Victor and put a 3000 lb mustang into the 8's. (8.96 153) Thats about 850+ hp at 7200. Race gas or E85. Originally built for a much heavier car limited street use.(why the smallish for race cam)

813 hp under 7000 rpm on real pump gas(from the local conveniant store btw) at only 10.7 compression is a very good number. Note the width of the power band from pk tq to pk hp. A 1700 rpm spread is very good for a single plane. Tq below pk tq on this is also very good and should drive well. (with a light foot )

Nice street motor that will do well at the track.

[torqjunki]

Very nice and impressive. First thought was....I gotta get me one of those!!

[slowbird]

LOL, I get flack from Calvin for saying I drove my pump gas engine (890hp engine) on the street and this one has more lift than I did. This is a pump gas race engine just like Calvin called mine. I had .750 lift and this one has .800 lift.
None the less it put up decent numbers congrats.

[twinturrbo406]

Originally Posted by slowbird

LOL, I get flack from Calvin for saying I drove my pump gas engine (890hp engine) on the street and this one has more lift than I did. This is a pump gas race engine just like Calvin called mine. I had .750 lift and this one has .800 lift.
None the less it put up decent numbers congrats.

.... thanks EC, i was curious, what was the duration @ .050 on your camshaft ?? ....

[Tom Vaught]

Originally Posted by slowbird

LOL, I get flack from Calvin for saying I drove my pump gas engine (890hp engine) on the street and this one has more lift than I did. This is a pump gas race engine just like Calvin called mine. I had .750 lift and this one has .800 lift.
None the less it put up decent numbers congrats.

I believe that MJM421 (Mike M) is running around .800 lift on his CV-1 Street engine.

Tom Vaught

[twinturrbo406]

Originally Posted by Tom Vaught

I believe that MJM421 (Mike M) is running around .800 lift on his CV-1 Street engine.

Tom Vaught

.... the lift without lash is .780/.778 ....

[slowbird]

Originally Posted by twinturrbo406

.... the lift without lash is .780/.778 ....

So this is a street engine, not a pump gas race engine?

[65nss4spdGTO]

Originally Posted by slowbird

So this is a street engine, not a pump gas race engine?

These heads seem to have an identity crisis. The east coast mafia feels the heads are no good for a race engine and the west coast guys say it's to much for the street. I guess we will just call it an Ugly Hybrid.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

[twinturrbo406]

Originally Posted by slowbird

So this is a street engine, not a pump gas race engine?

.... i think it's only fair, for someone to call it what they want, based on how much "radical" they can tolerate, it comes down to personal preference i guess, but, this engine idles nicely at 900-950 rpm, has a peak hp at 6800, and makes 620 ft-lbs at 3200 rpm, and does not fall below 600ft-lbs until 7,000 rpm, so in my opinion, i'd call it a street motor .... i'm sure this engine will run well with 3,500-4,000 convertor behind it ....
.... after all the pulls on the dyno, which were all with 93 pumpgas, the engine never went above 160 degrees, and never detonated once .... it uses rocker arms & guide plates, what more do you want from a drivable street engine ?? ....

.... also, it should be said, during or after all the dyno testing, we never had to adjust the rockers once ....

.... this thing will fit under a stock hood of just about any Pontiac, with the exception of a Fiero maybe, yeah, i'd say it's a street engine, defintely ....