Performer intake
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Performer intake
Hi all!
Running stock intake on my 468 with Sniper EFI.
My plan is to swap it for a aluminium intake but hood clearance is an issue...Torker will fit but i would like Performer to get more bottom end.
EFI dont like dualplane intakes...but plan is to mill down divider..
Anyone running Performer with stock BB hood?
Running stock intake on my 468 with Sniper EFI.
My plan is to swap it for a aluminium intake but hood clearance is an issue...Torker will fit but i would like Performer to get more bottom end.
EFI dont like dualplane intakes...but plan is to mill down divider..
Anyone running Performer with stock BB hood?
Instructor
Joined: Nov 2016
Posts: 169
Likes: 43
From: Stockholm Sweden
Tja Cliwi,
Tyvärr inte, inte vad jag vet,hört eller läst! Har du lämnat svenska corvetteforumet ?
Tyvärr inte, inte vad jag vet,hört eller läst! Har du lämnat svenska corvetteforumet ?
Passar på att fråga om den rosa kabeln på rattstången är för tändningen. Skall koppla in Snipern men är lite osäker vart den skall. Ha det bäst!
//Freddan
//Freddan
Race Director
Joined: May 2006
Posts: 18,606
Likes: 2,542
translation of above post
Well Cliwi,
Sorry, not what I know, heard or read! Have you left the Swedish Corvette Forum?
Matches to ask if the pink cable on the steering column is for the ignition. Must plug Snipern but it is a bit uncertain where it is going. Have an awesome time!
// Freddan
Well Cliwi,
Sorry, not what I know, heard or read! Have you left the Swedish Corvette Forum?
Matches to ask if the pink cable on the steering column is for the ignition. Must plug Snipern but it is a bit uncertain where it is going. Have an awesome time!
// Freddan
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
I just switched from a ZZ4 intake to the old Weiand Team G single plane... but haven't driven the car yet. I've done this because of all the internet theories (and my own) around single planes not losing as much power down-low when metering an EFI setup.
I'll let the thread know how it goes if I get some wheel time soon.
I'll let the thread know how it goes if I get some wheel time soon.
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
- Fuel pressures on a GM TBI setup are in the teens, vs 40+ for most modern aftermarket.
- GM TBI manifolds were designed for GM TBI dual-plane intake manifolds, not aftermarket carbed manfolds.
- Most of the GM TBI setups are 2 "barrel", with exception to CFI.
There's an Engine Masters video out there that says a specific combo worked better with a dual plane than a single plane.
My hypothesis isn't that TB-EFI "doesn't like dual-planes" it's that the torque loss from a single plane intake won't impact EFI setups as much as it would a carbed setup, since fuel metering doesn't rely on vacuum signal anymore. The tuning dynamics of shorter, larger runners still has an impact(IE shifting powerband to higher RPM range).
The other part of my theory is that at low throttle angles, that fuel has to make many very-sharp turns in a dual-plane setup. Having the fuel come in at high pressures and immediately hooking turns can't be great. Plenum volume and air stability have to be significantly better in a common plenum (single plane) environment where it's a much straighter shot to the cylinders. I don't know a thing about fluid dynamics, though, so I could be completely wrong.
At this point, it's wait-and-see...
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Dont remember what cable i connected, got some help from a car electrician..
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Le Mans Master
Joined: Oct 2002
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From: Las Vegas - Just stop perpetuating myths please.
Hi all!
Running stock intake on my 468 with Sniper EFI.
My plan is to swap it for a aluminium intake but hood clearance is an issue...Torker will fit but i would like Performer to get more bottom end.
EFI dont like dualplane intakes...but plan is to mill down divider..
Anyone running Performer with stock BB hood?
Running stock intake on my 468 with Sniper EFI.
My plan is to swap it for a aluminium intake but hood clearance is an issue...Torker will fit but i would like Performer to get more bottom end.
EFI dont like dualplane intakes...but plan is to mill down divider..
Anyone running Performer with stock BB hood?
I have read of fuel puddling/distribution problems with EFI on a dual plane sbc. Nothing about big blocks though and the BB may have an entirely different fuel distribution in the manifold compared to a sbc.
Well this doesn't answer your hood fitment question but for that I would look at Edelbrock's w/s as they provide all they're intake height dimensions. So I took a look at Edelbrock's online catalog have it says the Torquer II will fit under stock corvette hood while and the new Performer II requires hood modifications.
Last edited by cardo0; Dec 30, 2017 at 01:34 PM. Reason: Ooops! My incorrect information on fitment!
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Drive one with the single plane was done last night. The engine nearly stalled coming to the first stop sign - always nerve wracking. ECM figured it out and didn't stall again after.
Car is still learning - lots of stumbling in the 1500-2500 range which eventually sorted itself out.
Results inconclusive - I'd say there is *probably* a loss of torque down low (no surprise) but definitely more raucous up top. The tradeoff point feels like it's around 2500.
With some more driving, I'm sure it'll be a bit better. I'll update the thread after I get some more drive time in.
(I'm struggling to timeshare the car hobby between a 3 year old and a 2 month old - who's starting to scream into the baby monitor right now
)
Car is still learning - lots of stumbling in the 1500-2500 range which eventually sorted itself out.
Results inconclusive - I'd say there is *probably* a loss of torque down low (no surprise) but definitely more raucous up top. The tradeoff point feels like it's around 2500.
With some more driving, I'm sure it'll be a bit better. I'll update the thread after I get some more drive time in.
(I'm struggling to timeshare the car hobby between a 3 year old and a 2 month old - who's starting to scream into the baby monitor right now
)
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Drive one with the single plane was done last night. The engine nearly stalled coming to the first stop sign - always nerve wracking. ECM figured it out and didn't stall again after.
Car is still learning - lots of stumbling in the 1500-2500 range which eventually sorted itself out.
Results inconclusive - I'd say there is *probably* a loss of torque down low (no surprise) but definitely more raucous up top. The tradeoff point feels like it's around 2500.
With some more driving, I'm sure it'll be a bit better. I'll update the thread after I get some more drive time in.
(I'm struggling to timeshare the car hobby between a 3 year old and a 2 month old - who's starting to scream into the baby monitor right now)
Car is still learning - lots of stumbling in the 1500-2500 range which eventually sorted itself out.
Results inconclusive - I'd say there is *probably* a loss of torque down low (no surprise) but definitely more raucous up top. The tradeoff point feels like it's around 2500.
With some more driving, I'm sure it'll be a bit better. I'll update the thread after I get some more drive time in.
(I'm struggling to timeshare the car hobby between a 3 year old and a 2 month old - who's starting to scream into the baby monitor right now
)Question is if a dualplane will improve it and the million dollar question: is there a way to fit it under a stock BB hood, not L88...
Racer
Joined: Jul 2014
Posts: 324
Likes: 7
From: Washington
I understand I only have a small block (350), but to kinda give you a reference. I have a 75 L-82 with a performer intake and a edelbrock AVS 2. I put an edelbrock air cleaner (part #43662) on it. It lightly touches the hood when closed so I had to order a K&N (part #E-3740) air filter which is 2.31 inches vs the 3 inches Edelbrock filter.
BTW
I had to bend up the air cleaner base (14 inches) to clear the Pretonix HEI distributor.
BTW
I had to bend up the air cleaner base (14 inches) to clear the Pretonix HEI distributor.