88v8 Ivor Duarte Gloucestershire UK (1042 posts) Registered: 02/11/2010 04:29AM Main British Car: 1974 Land Rover Lightweight V8 |
Re: WTB JWR Offy 7001 Intake Manifold
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joe_padavano Joseph Padavano Northern Virginia (157 posts) Registered: 02/15/2010 03:49PM Main British Car: 1962 F-85 Deluxe wagon 215 Olds |
Re: WTB JWR Offy 7001 Intake Manifold
Those Offy dual port intakes are the goofiest design ever. It should tell you something that in the half century since those were introduced, not one other manufacturer has ever made an intake with that design (and no, any patents expired decades ago). It's two flat single plane intakes, one for the primaries and one for the secondaries. Crappy flow with no benefits, and the lower profile on this one just makes it worse.
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88v8 Ivor Duarte Gloucestershire UK (1042 posts) Registered: 02/11/2010 04:29AM Main British Car: 1974 Land Rover Lightweight V8 |
Re: WTB JWR Offy 7001 Intake Manifold
With the small runners it was designed to give high air velocity at low revs. More about torque and fuel consumption than HP.
Some discussion here [www.speed-talk.com] I suspect that a lot of users including me would get better results after a rolling road carb setup. That would make way more difference than a change of manifold. Ivor |
joe_padavano Joseph Padavano Northern Virginia (157 posts) Registered: 02/15/2010 03:49PM Main British Car: 1962 F-85 Deluxe wagon 215 Olds |
Re: WTB JWR Offy 7001 Intake Manifold
"With the small runners it was designed to give high air velocity at low revs. More about torque and fuel consumption than HP. "
Sorry, but that flat, wide single plane plenum is NOT going to give you "high air velocity at low revs". You want signal at the carb, and this doesn't do that for you. The divider actually hurts top end flow, which is what you want a single plane intake for. Again, if this was such a great idea, why has NO ONE copied it in the last half a century? It's a gimmick. While you're at it, get one of those "Tornado" things to go under the carb. |
BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6470 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: WTB JWR Offy 7001 Intake Manifold
I had one, wasn't impressed with it. Might be OK if you cut out the dividers. That's what I did when I turned it into the base for a blower intake.
Jim |
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88v8 Ivor Duarte Gloucestershire UK (1042 posts) Registered: 02/11/2010 04:29AM Main British Car: 1974 Land Rover Lightweight V8 |
Re: WTB JWR Offy 7001 Intake Manifold
The 'Tornado', is that like the Mangoletsi Manifold Modifier, I had a pair of them with my SUs :}
[www.mangoletsimanifolds.com] Ivor |
88v8 Ivor Duarte Gloucestershire UK (1042 posts) Registered: 02/11/2010 04:29AM Main British Car: 1974 Land Rover Lightweight V8 |
Re: WTB JWR Offy 7001 Intake Manifold
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