Edelbrock Pro-Flo XT EFI system BBC in a marine application
12-01-2022 | 03:08 PM
#61
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From: Tennessee
[QUOTE=Joeyboost;4852652]Do you have a Proflow XT intake already? I spoke to Holley and they have absolutely NO CLUE when they will be producing and shipping new orders. Its been 2+ years since one has shipped to a customer!
My plan is your plan almost exactly but looks like I am going to either adapt Holley HP to the stock MPI intake or go with multi-port throttle body style injection system.[/Q
I already have a pair of them that i found couple months ago purchased used that had dyno time only. They were on 509 with dart 325 heads and m1sc procharger set up and made 825hp on 4.5lbs of boost. I am going to use them n/a for now.
My plan is your plan almost exactly but looks like I am going to either adapt Holley HP to the stock MPI intake or go with multi-port throttle body style injection system.[/Q
I already have a pair of them that i found couple months ago purchased used that had dyno time only. They were on 509 with dart 325 heads and m1sc procharger set up and made 825hp on 4.5lbs of boost. I am going to use them n/a for now.
12-01-2022 | 05:07 PM
#62
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Ive done that with the gen V FAs too, I HIGHLY advise against doing it with the Gaffrig though, as in I dont see it being possible since I tried several ways and had problems. Because the gaffrig is not as ridgid as a Gen V and the threaded rods have to hold tb in place AND hold Fa on, what happens is it squeezes the Mesh on FA enough to jam into the throttle arm once you actually have it tight enough. The factory gen V studs (which is exactly what gaffrig is selling for 35$ each) have a locating shoulder that goes into the Gen % TB, on a gen 6 TB, it has to have the 4 holes spot faced in a mill for the countersunk tb fasteners (no big deal). So in the course of trying to run one with threaded rod on dyno, I almost had catastrophic destruction of a customers engine. The gaffrig also uses 4 little 1/4 28 button head bolts to hold the assembly together, when I did get the threaded rod to actually hold it and throttle to clear, the tension caused the bolts to come loose from the spacers and it sucked a spacer into the throttle blades. This happened at end of a dyno pull, luckily it was just a brief scare when thottle hung when letting off and it DIDNT get sucked into engine and into a valve, I highly advise people to stud those spacers with red loctite and put ;locknuts on OUTSIDE of FA or at least red loctite the screws gaffrig has in there, Smitty
When installing the Gen V FA on the Gen VI engine, is there any advantage to using the Gen V TB with the air horn that the Gen VI does not have? Thank you
12-04-2022 | 12:52 PM
#63
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From: frankenmuth michigan
The only advantage is IF your using the gen V FA AND the stock shouldered studs, you wont have to counterbore the gen V TB for where the shoulders countersink. I have NOT flow bench tested a GEN V FA vs a GEN 6 with/without the IAC air horn to see if that air disrupts airflow since when I bore out the Gen V's and make/fit throttle blades, its removed, Smitty
12-04-2022 | 12:59 PM
#64
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From: frankenmuth michigan
I think the original E TB is a 90 and has a lip on OD, your 92 may not. So if it DOES gring it or machine od smooth, if needed cut slits on the smaller id airhorn adapter directly inline with the re enforcing ribs, heat it up with heat gun, stretch it over od of TB and tighten it down while its still hot so it fits nice. That 21$ volute was worth over 200 CFM and about 5% hp gain, on top of that, with a 4" or 4.5" clamp on, it killed HP further from no volute and with a big enough 6" clamp on, it hardly dropped WITH volute, Smitty
12-04-2022 | 07:00 PM
#65
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From: On A Dirt Floor
Maybe something good in near future ? Skimming the GMPP catalog and reading about the COPO 572, it shows/refers to it’s intake as a Holley HiRam.
#1: No listing that i can find for it yet in that catalog nor Holley’s. Anyone find one ?
#2 : The Copo 572 is a tall deck motor, therefore it’s intake will be for a tall deck. Maybe they’ll make on in near future for standard deck ? Who knows,
but it’s something to kerp sn eye out for.
#1: No listing that i can find for it yet in that catalog nor Holley’s. Anyone find one ?
#2 : The Copo 572 is a tall deck motor, therefore it’s intake will be for a tall deck. Maybe they’ll make on in near future for standard deck ? Who knows,
but it’s something to kerp sn eye out for.
12-04-2022 | 07:06 PM
#66
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Posts: 3,869
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From: St. Pete Beach, FL
Maybe something good in near future ? Skimming the GMPP catalog and reading about the COPO 572, it shows/refers to it’s intake as a Holley HiRam.
#1: No listing that i can find for it yet in that catalog nor Holley’s. Anyone find one ?
#2 : The Copo 572 is a tall deck motor, therefore it’s intake will be for a tall deck. Maybe they’ll make on in near future for standard deck ? Who knows,
but it’s something to kerp sn eye out for.
#1: No listing that i can find for it yet in that catalog nor Holley’s. Anyone find one ?
#2 : The Copo 572 is a tall deck motor, therefore it’s intake will be for a tall deck. Maybe they’ll make on in near future for standard deck ? Who knows,
but it’s something to kerp sn eye out for.
12-04-2022 | 07:22 PM
#68
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From: Grand Rapids, MI
I read in another article that GM had to design a custom intake to accept the Holley LS7 HI-RAM upper lid. The base intake manifold is GM and the upper is Holley. I've been searching for that lower for a year.
12-04-2022 | 07:36 PM
#69
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From: On A Dirt Floor
:wink :cough :wink
12-04-2022 | 07:45 PM
#70
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From: St. Pete Beach, FL
The dart is kind of porter special, not the best ootb. Maybe it matches up to the smaller heads well.
