Tuning
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1st Gear
Joined: Jun 2024
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Tuning
I have an 89 that has a 5.7 ZZ 4 crate. Bought from a guy last Dec. He put a Holley 600 dbl pump on it. The car just didn't seem to perform the way I expected so I purchased a new 800 Holley dbl pumper and I am having a time tuning this thing. Either it has jet ***** off the line and boggs down when I cam range and I step on it or I seems to be crying for fuel at a red light any help would be awesome. Thank you
Drifting
Joined: Mar 2006
Posts: 1,263
Likes: 188
From: Wabasha Mn
I have an 89 that has a 5.7 ZZ 4 crate. Bought from a guy last Dec. He put a Holley 600 dbl pump on it. The car just didn't seem to perform the way I expected so I purchased a new 800 Holley dbl pumper and I am having a time tuning this thing. Either it has jet ***** off the line and boggs down when I cam range and I step on it or I seems to be crying for fuel at a red light any help would be awesome. Thank you
Pro
Joined: Jun 2018
Posts: 532
Likes: 104
I have never had good luck with Holley carbs. I always liked the Rochester carbs better, they seem to be easier to dial in across the whole powerband. With a Holley I was either bogging down low or startving up high.
A Holley 800 seems like way too much carb for a SBC. The Rocester carbs used on a lot of GM small blocks were that big, but the Holleys are difficult to dial in with small carbs and seem to be even worse with bigger carbs.
A Holley 800 seems like way too much carb for a SBC. The Rocester carbs used on a lot of GM small blocks were that big, but the Holleys are difficult to dial in with small carbs and seem to be even worse with bigger carbs.
