540 pump gas hyd roller dyno resulst
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540 pump gas hyd roller dyno resulst

  1. #1
    steelcomp was here
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    Default 540 pump gas hyd roller dyno resulst

    Dyno results from customer-built 540 BB Chev, AFR 305 as-cast heads, Straub custom hyd roller 245/252 @ .05, <.650 lift.

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    Senior Member Sharkbit's Avatar
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    Nice numbers! I've got interest because I've got a straub cam in the mail.

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    Quote Originally Posted by steelcomp View Post
    Dyno results from customer-built 540 BB Chev, AFR 305 as-cast heads, Straub custom hyd roller 245/252 @ .05, <.650 lift.

    Whats this going in?..so, 1 carb, tunnel ram ..What?

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    steelcomp was here
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    Quote Originally Posted by Gone Green View Post
    Whats this going in?..so, 1 carb, tunnel ram ..What?
    Car engine, Performer AirGap, 4150 carb. You could put a TR and a pair of 750's on this and have easy [email protected]~6200 with a little bigger hyd roller (250-ish, .650 lift). Make a great jet boat engine. A Vic Jr and a 900cfm 4150 would be worth 30hp, probably give up a few lbs/ft.
    Last edited by scott foxwell; 08-22-2013 at 07:21 PM.
    If God is your co-pilot, change seats!
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    steelcomp was here
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    Quote Originally Posted by Sharkbit View Post
    Nice numbers! I've got interest because I've got a straub cam in the mail.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Quote Originally Posted by steelcomp View Post
    Car engine, Performer AirGap, 4150 carb. You could put a TR and a pair of 750's on this and have easy [email protected]~6200 with a little bigger hyd roller (250-ish, .650 lift). Make a great jet boat engine. A Vic Jr and a 900cfm 4150 would be worth 30hp, probably give up a few lbs/ft.
    Thanks..Ive got a Straub cam in my deal.....too good

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    Senior Member jetjunky's Avatar
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    nice mill, that should generate a few smiles upon occasion to say the least. What was the static compression ratio? How much would the power curve be effected with a cleanup done on the runners and chambers? Would the 250ish duration bump be a concern/problem with the reversion potential of a jacketed set of lightning headers in a jet application?

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    Senior Member MACHINEHEAD1's Avatar
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    Used the 305AFR with the cnc chamber a lot on 540s. 850/vic jr. (pulling vac.) 248/254-.648 hyd roller. 715-720lbs 720-730hp. Sold a bunch of em. Bravo 1, v-drive, jet. Works in everything. Those numbers look legit. 68' Camaro in the shop right now with one of these engines. TKO600 and 411 gear. 1-3rd is useless! Total animal.

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    steelcomp was here
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    Quote Originally Posted by jetjunky View Post
    nice mill, that should generate a few smiles upon occasion to say the least. What was the static compression ratio? How much would the power curve be effected with a cleanup done on the runners and chambers? Would the 250ish duration bump be a concern/problem with the reversion potential of a jacketed set of lightning headers in a jet application?
    Hey JJ, compression was 10:1. Usually more air flow with the same cam just moves the power curve up in the rpm range, with more power of course. The cam in this engine would not be wet-exhaust friendly but we can create a similar cam that would be. The biggest issue is where the water is injected into the exhaust system. The further from the engine, the better.
    If God is your co-pilot, change seats!
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    steelcomp was here
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    Quote Originally Posted by MACHINEHEAD1 View Post
    Used the 305AFR with the cnc chamber a lot on 540s. 850/vic jr. (pulling vac.) 248/254-.648 hyd roller. 715-720lbs 720-730hp. Sold a bunch of em. Bravo 1, v-drive, jet. Works in everything. Those numbers look legit. 68' Camaro in the shop right now with one of these engines. TKO600 and 411 gear. 1-3rd is useless! Total animal.
    We seem to be doing a lot of these. ATK has used a few of Chris's cams in their 540 builds with good success. We did a pump gas 540 HR not long ago with the 315's that made 770/717, 6300/5000.
    If God is your co-pilot, change seats!
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    Senior Member TNYoungblood's Avatar
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    Nice
    WFLC The REAL #321 Kentucky Drag Boat Association 2016 NJBA 10.0 High Points Champ

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    Senior Member Skydog's Avatar
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    Wow killer man! Is it normal for oil psi to go down with rpm? Just asking great work!!!

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    Quote Originally Posted by Gone Green View Post
    Whats this going in?..so, 1 carb, tunnel ram ..What?
    A 4 Door Jaguar.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    steelcomp was here
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    Quote Originally Posted by Skydog View Post
    Wow killer man! Is it normal for oil psi to go down with rpm? Just asking great work!!!
    NO. That's something the engine builder will have to address. That's the result of a stroker crank with a small oil pan and no windage control.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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