EFI intake choices-383 L31
Thread Starter
Intermediate
Joined: Nov 2015
Posts: 42
Likes: 1
From: Ashburnham MA
EFI intake choices-383 L31
Finally scored a 4 bolt L31 block on the cheap, being clearanced and bored for a forged 383 kit Next week. It will be topped with AFR 195 eliminators, 10.5:1 compression, custom LT headers, etc. looking for around 450hp at the crank on 93 pump gas and make power to about 6000 rpm, before signing off at 6500. As the system right now is TPI, I'd like to keep it EFI for tunability, etc. there is some confusion between intakes for me. I hear mixed reviews between the weiand/Holley stealth ram, or an accel super ram. I also have yet to select a cam. I'm looking for something that can tolerate occasional nitrous usage, but be more street oriented. Any pointers are well appreciated.
Team Owner
Joined: Jul 2004
Posts: 28,501
Likes: 3,302
From: Hartford WI
Finally scored a 4 bolt L31 block on the cheap, being clearanced and bored for a forged 383 kit Next week. It will be topped with AFR 195 eliminators, 10.5:1 compression, custom LT headers, etc. looking for around 450hp at the crank on 93 pump gas and make power to about 6000 rpm, before signing off at 6500. As the system right now is TPI, I'd like to keep it EFI for tunability, etc. there is some confusion between intakes for me. I hear mixed reviews between the weiand/Holley stealth ram, or an accel super ram. I also have yet to select a cam. I'm looking for something that can tolerate occasional nitrous usage, but be more street oriented. Any pointers are well appreciated.
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
The HSR requires some modification to fit, either to the HSR itself or cutting a hole in the hood. The Super Ram is worse than a TPI to install and won't give as much hp as an HSR. And finally, and probably the best of choices, the Miniram. On the expensive side, but you don't have to modify anything and it's a breeze to install. And you will definitely hit 450 with a Miniram, no doubt.
Thread Starter
Intermediate
Joined: Nov 2015
Posts: 42
Likes: 1
From: Ashburnham MA
The HSR requires some modification to fit, either to the HSR itself or cutting a hole in the hood. The Super Ram is worse than a TPI to install and won't give as much hp as an HSR. And finally, and probably the best of choices, the Miniram. On the expensive side, but you don't have to modify anything and it's a breeze to install. And you will definitely hit 450 with a Miniram, no doubt.
Team Owner
Joined: Jul 2004
Posts: 28,501
Likes: 3,302
From: Hartford WI
I've heard good and bad things about TPiS products. I've never used any of their product's however, so I wouldn't know. I'm not opposed to chopping up the hood to fit, I have another hood off my buddy's '87 that got T-boned last spring. He has a C6 now. As for tuning, I'm leaning toward the HSR kit, as it includes all the fittings, wiring, etc to install to the stock hard fuel lines, ecm, etc. this will be the first time I've worked with EFI from a tuning perspective, so I'm clueless. I do like the idea of being able to mess with the system on the fly with a laptop.
Team Owner
Joined: Jul 2004
Posts: 28,501
Likes: 3,302
From: Hartford WI
The HSR requires some modification to fit, either to the HSR itself or cutting a hole in the hood. The Super Ram is worse than a TPI to install and won't give as much hp as an HSR. And finally, and probably the best of choices, the Miniram. On the expensive side, but you don't have to modify anything and it's a breeze to install. And you will definitely hit 450 with a Miniram, no doubt.
As to the Superram, you hog out the holes on the intake manifold, helicore them, slot the screws so you can use a fine driver to turn them till they stop, do the last 1/4 turn with the wrench. That was the LPE trick they told me. Others have put helicores on the runners and screwed from the top with locktite on the bolts.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
I ran a SuperRam on my 406 for years and it was a great street/strip intake. I am now running a Miniram on the same motor. The miniram is a tenth or two faster in the quarter, but for a street car, you can't beat the SuperRam. It had a wide, flat torque curve. I would launch at 2000 rpms and the car would run 10.50s. Shift points were around 6300. With The Miniram, I have a different cam and converter. I leave at 3000 rpm, shift at 6700 rpms and now run 10.20s but other changes have been made to the car between intake changes. Can't go wrong with either.
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Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
Good single plane intakes can make very good power when cammed correctly.
https://www.corvetteforum.com/forums/c4-tech-performance/3656529-383-afr-195-dyno-s.html
I like using the Edelbrock Victor EFI, as you can see even in a very mild engine the power and power curve can be great, but the HSR and Mini Rams can run equally well in certain circumstances.... Every thing is in the combination.
Will
https://www.corvetteforum.com/forums/c4-tech-performance/3656529-383-afr-195-dyno-s.html
I like using the Edelbrock Victor EFI, as you can see even in a very mild engine the power and power curve can be great, but the HSR and Mini Rams can run equally well in certain circumstances.... Every thing is in the combination.
Will
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
I ran a SuperRam on my 406 for years and it was a great street/strip intake. I am now running a Miniram on the same motor. The miniram is a tenth or two faster in the quarter, but for a street car, you can't beat the SuperRam. It had a wide, flat torque curve. I would launch at 2000 rpms and the car would run 10.50s. Shift points were around 6300. With The Miniram, I have a different cam and converter. I leave at 3000 rpm, shift at 6700 rpms and now run 10.20s but other changes have been made to the car between intake changes. Can't go wrong with either.