New combo, advice, opinions welcome

[Hitchcock]

Well, here is the 73 vette we are setting up, 496 cu in, fully ported canfield 310 heads, with a full hand port that have a cross section of 1.75x2.45=4.2 total cross section, max flow is 350 @.700 on a 4.31 bore plate, and 225@.700 on the exh. with no pipe. 2.30 & 1.88 valves, with titanium retainers, comp 1.7 ratio magnum rockers. Right now it has a weiand Team G, and an 1150 (7320) diominator, but we are talking a tunnel ram with two 1050's. Srp 18 cc. dome pistons, put .005 down in the hole, and the heads have 113 cnc. chambers so static cr is gonna be around 10.5-10.75 after the head gasket. Cam is a custom comp 4-7 swap .744 .714 lift 278-288@.050 on a 113 LSA, and 110 ICL.
The car gonna be 4-linked and coil overs, and probably 4.56 gears with a 28x10.5 slick. The trans is a th 400 with a 9 in. tci converter with 5200 stall. We are hoping to take the car's weight from 3500 lb all iron sbc with driver to 3300 raceweight with aluminun top end bbc. questions, comments, opinions, and predictions are all welcome. This is a first effort for me so any help is much appreicated. thanks

http://i168.photobucket.com/albums/u188 ... vette4.jpg
http://i168.photobucket.com/albums/u188 ... vette2.jpg
http://i168.photobucket.com/albums/u188 ... 040065.jpg
http://i168.photobucket.com/albums/u188 ... 040067.jpg

[wikd69]

Well, here is the 73 vette we are setting up, 496 cu in, fully ported canfield 310 heads, with a full hand port that have a cross section of 1.75x2.45=4.2 total cross section, max flow is 350 @.700 on a 4.31 bore plate, and 225@.700 on the exh. with no pipe. 2.30 & 1.88 valves, with titanium retainers, comp 1.7 ratio magnum rockers. Right now it has a weiand Team G, and an 1150 (7320) diominator, but we are talking a tunnel ram with two 1050's. Srp 18 cc. dome pistons, put .005 down in the hole, and the heads have 113 cnc. chambers so static cr is gonna be around 10.5-10.75 after the head gasket. Cam is a custom comp 4-7 swap .744 .714 lift 278-288@.050 on a 113 LSA, and 110 ICL.
The car gonna be 4-linked and coil overs, and probably 4.56 gears with a 28x10.5 slick. The trans is a th 400 with a 9 in. tci converter with 5200 stall. We are hoping to take the car's weight from 3500 lb all iron sbc with driver to 3300 raceweight with aluminun top end bbc. questions, comments, opinions, and predictions are all welcome. This is a first effort for me so any help is much appreicated. thanks

http://i168.photobucket.com/albums/u188 ... vette4.jpg
http://i168.photobucket.com/albums/u188 ... vette2.jpg
http://i168.photobucket.com/albums/u188 ... 040065.jpg
http://i168.photobucket.com/albums/u188 ... 040067.jpg

Maybe it's just me, but not of your photos link correctly. Would love to see your ride :)

[Hitchcock]

http://www.youtube.com/watch?v=0yRziTJ1Vjs
http://i168.photobucket.com/albums/u188 ... vette4.jpg
http://i168.photobucket.com/albums/u188 ... 040067.jpg
http://i168.photobucket.com/albums/u188 ... 040065.jpg

[sunsation540]

the lift i like the duration is to high, for a pump gas deal by like 10-15 degrees and 2 anything over 950s is to big i won't pull anything the single is ok at 1150 cam is to big.. fyi 505 10.2 dart 325 non cnc 724/708 300/315 265/ 276 pump gas team g 1050 400/4500 3500 lbs runs 10.20s @2800 ran 9.70s with a plate 225 ran 8.60s glide 14.32 same converter unless u are trying to kill bottom end???

[Hitchcock]

Yeah, the cam is way off from what i thought I was gonna get, but the guy at comp cams who my builder works with insisted it would impress. And my builder said every time he has a cam spec'd for a motor this guy hits the perfrmance on the money. So at this point i'm just putting my faith in him. As for bttom end, I'm gonna be launching at over 5000 so that story is told there. I just need enough bottom end to move it around town on the weekend cruise. It has definately taken a walk on the wild side with the tunnel ram and 1050's. Some say it wont work others say it will. If it does not I always have my single carb setup.

[The ORIGINAL 1320racer]

With all due respect to your engine builder, I'd find another guy if he agrees with Comp's recomendation for this engine!

The only thing that impresses me is the time slip taking into account the weight of the vehicle!

Don't know what it is you're trying to do with this car/combo but from what you listed it is a classic mismatch of parts and won't fall out of a tree relatively speaking for what it is and what it has!!

If it's not too late, I advise you to rethink your selection of parts!

FYI, the cam in my 522 is much smaller @ .050 and it has much more compression!

With a 4150 1000HP read 850 carb it made 850HP.

With a 1050 Dominator and a vacuum pump is made 900HP!

[sc racing]

I agree with all these guys on this one. We built a similar engine for a 2800 lb ladder bar 87 camaro: 496 13:1 dart cnc 355 heads victor intake 1050 carb but a smaller cam a dont remember the specs but I know it was no where near 278@ .050. Switched to a holley pro tunnel ram with 2 1150,s and saw very little gain especially for what it cost. Even with same cu in we had more compression, bigger heads an lighter car with the smaller cam.Also a long time ago I had a crate ls7 454 which is 12.5:1 stock heads Ultradyne roller .670 264*/268* on a 110 with sigle victor and 1050 made 625hp tried a tunnle ram with 2 1050's made 645 hp and a flatter touque curve . I never ran it with the 2 1050,s but I didnt see it beeing worth the extra $$.

[supernova]

I agree with these guy's.
I run a .716/.714 lift with 276/ 282 at .050 109 icl in a 525 c.i. with Dart 325 heads cnc'd and think the cam is to big. I think a smaller cam might be better.

[Hitchcock]

That has been my thinking all along, but money is already invested in what I have. I dont have the two 1050's yet. I found a shop that will let me trade my 1150 in on a prosystems 1050 for a 500 dollar core, that seems like it would be worth it. Also thought about recamming if this setup disappoints. If i was to switch to a cam like a .720/.720 265 272@.050 on a 108 lsa, would the sniper jr be a good intake? Or the Vic. 454-R?

[The ORIGINAL 1320racer]

what are your ET goals and what purpose is this car being built for...

street/strip and if so what % of each

or will it be strip only?

Regardless you don't want a sniper jr. manifold and the cam you listed is still too big @ .050!!

[Hitchcock]

Street manners are of very little concern at this time. My house is less than 10 miles from the track. It is gonna be mostly ( at least 75%) strip with the few trips around town and to the cruise in. Goals are to run as quick as possible and not have to run race gas. I'm really hoping to get the car running 10.30'
s or quicker. I know it's doable to get as quick as 10.0's with 500 cu in and 3300 lbs with the right parts and tuning

[Hitchcock]

I agree with these guy's.
I run a .716/.714 lift with 276/ 282 at .050 109 icl in a 525 c.i. with Dart 325 heads cnc'd and think the cam is to big. I think a smaller cam might be better.



How much compression are you running in the 525? And did you use a tall deck block to get 525?

[sc racing]

I dont think youll have a problem running 10.30's with your setup my camaro ran that with the 454 @ 3400lbs.

[Hitchcock]

I hope not, I've already inested lots of cash in what it have. But like I said, if it disapoints try again. As for the cam being large, yeah it is. No doubt about it. The IVC timing is 69 degrees, and that kills dynamic compression with a 10.5:1 motor, but Like I said, my builder has had over 200 cams ground from this one guy's recomendation and he said no one was ever disapointed. So as I said earlier I'm putting all my faith into my guy. He has done a lot of work for several people I konw and they were all impessed. I hope when we get this thing going it will be fun, thats all I can ask. Hopefully getting the cars weight down a bunch will help this thing scoot.

[supernova]

I agree with these guy's.
I run a .716/.714 lift with 276/ 282 at .050 109 icl in a 525 c.i. with Dart 325 heads cnc'd and think the cam is to big. I think a smaller cam might be better.



How much compression are you running in the 525? And did you use a tall deck block to get 525?

12.2 / 1 static and 9.3 / 1 dynamic, Yes it is a tall deck block. 4.310 B X 4.500 S
Tq. monster, it made over 900 ft lbs of tq at 5000 rpm's and 1012 hp at 6500 rpm's with a 200 shot of n2o on the dyno at Reher-Morrisons in Arlington Tx.
I can run 93 pump gas in it but I don't. You can go much higher in compression but when it gets to high the nitrous is less affective. You have to have space to put the n2o in.

I run a 200 to 250 shot with 1 system. The drag radial class I run only allows 1 system and the drag radial size is only 275/60/15. the class record is now a 5.44 in the 1/8. the guy that ran it is using a 540 ci with a 200 shot. I have run a 5.63 with my old car and hope with the changes I've made to the new car it will run down there where his is. I hope to have it finished by next March.