Rob 97 Z28

In short, did some searching and am having trouble finding my answer(s) So here goes... Buttoning up my 357: Eagle 3.48 crank Eagle SIR forged H-beams Speed Pro forged pistons (p/n: ZL2256F40) Comp XFI 216/223 .493/.499 113 LSA Comp Lifters Summit billet DR timing chain Sportman II heads Weiand intake Car is an Auto and will have a built 700-R4 with a 3k ACT converter. Eventually it'll have the 3:23's and the posi installed as well. This car is going to be my street/strip ride some track times if time permits. All accesosries deleted (A/C, P/S) crank windows, manual locks & mirrors, no power seats etc. Q: I have a low mileage Edelbrock 750 waiting to go on, What kinda of power (HP, more importantly TQ) and I leaving on the table? (assuming the carb is maxed out as far a performance for this application)?? Q: Would it be worth the money to buy a Holley 750 DP to replace the edelbrock? Q: What makes the holley design that much more efficient over the edelbrock/carter design? Sorry for rambling just trying to understand the clear preference for Holley's over edelbrock's Thanks!!! Rob

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1991 Camaro RS V6 (waiting for her SBC to go in)

2002 Z28
!FRA, SLP -lid, STB, fanswitch, Sphon SFC's, DMH elec. cut-out, Edelbrock LTs & Y-pipe, Hooker cat-back,LS7 clutch kit, NGK TR55's, CWM rims, Nitto 555's

USAF Vehicle MX: We take it in the a$$, so you don't have too

MaDeNMiAMi305

I currently have a holley and I'm looking to buy an edelbrock. I'm not sure about numbers but I can tell you from experience that I'm constintly have to tune it. Edelbrocks stay on point. Just to put my two cents in. Good luck.

five7kid

If you're constantly tuning your Holley, it ain't the carb's fault.

Whether it would be "worth the money" to buy a Holley DP is a call only you can make.

Rob 97 Z28

Worth the monry to me would be 15 ft/lb of torque or more. That would be worth the extra cash to buy. Im just curious as to what holley, a 750 cfm DP or a 770cfm Street Avenger??



Thanks!

Rob

topless87

Just my 2 cents, but with a tall rear gear (3.23,3.42) I'd recommend the vacuum secondary Avenger. You can tune the rear barrels to come in when the car wants it and it looks like you have an automatic, so the DP might load it up when you first put your foot in it. I usually use a DP on a car with a standard tranny and low (3.73,4.11,4.56) rear gear. Just my opinion tho'. In a recent "experiment", a buddy of mine with a GTO (4 speed car) took his Edlebrock off and swapped on my 800 DP Holley and thought that he had a new motor by the difference in performance. The Holley made that thing scoot. He had a few people tell him he was over carburating it, but the proof was in the pudding, it was amazingly faster, he didn't want to give me back my 800!!! LOL

Rob 97 Z28

Topless, Thanks for your input. I appreciate real world claims with reasoning, keeping in mind gears etc. I think i may shop around a street avenger. I heard good things about them...

vindeezl

x2!!!

People bitch and moan over getting a bit of gas on their hands when they pull a bowl screw...I'll take that anyday over a made in china Carter AFB.

All my Holleys have ran hard with a bit of tweaking, but then it is set it and forget it. I've had a new out of the box Edelsnot take a ****

topless87

As of this moment there is a 770 on Ebay, #110418913768, it doesn't have the electric choke COVER on it (some fool took it off), but there is a cover for sale also. I think the carb was starting at $149.00 + s/h and the cover is there if you search "street avenger", and I think it was $15.99 + s/h. I bought mine a year ago, actually on accident, when I put in a bid for $100 and WON! Wife wasn't very happy, but I sure was. Those new carbs have anti-backfire devices (check ball and seat) installed into the base plate so you don't have to worry about blowing a power valve if it ever belches back. You might check it out, I think there were 3 days left on it and currently no bids. FYI - Marty

mooch1

i had the same problems with the holley, i have an edelbrock and so far so good.

topless87

Would you like to sell that junk Holley? I might be interested. Thanks

mooch1

i sold it a long time ago, it wasn't junk, but i really don't miss the holley all that much.

topless87

i understand. Thanks for the reply. Marty

five7kid

The gear doesn't have anything to do with DP vs. VS. Stall speed does, and all you need to do is keep RPMs above the "bog" point of a WOT DP.

A 750 DP on a 350 is good above about 1300 RPMs.

topless87

Maybe, from experience

Rob 97 Z28

I appreciate all the input guys, looks like a 770 cfm Street Avenger is in the near future for me