289/ 302 torque
Junior User
Joined: Oct 2003
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RacinNdrummin Well #1, it depends on the year of your engine. My 69' 302 in my maverick stock 2v made 210hp/300lb.ft. If it is a mid 70's/early 80's 302, junk it, they're crap and made less torque and HP than a 289. Go to the junk yard and find an H.O. roller out of a 1988 or up mustang GT or Lincoln LSC, or find a pre-72' 302 and buy the long block. If your lucky yo may even find an explorer 5.0, they have better heads and camshafts than the H.O. but you have to use special headers. With the price of your cam kit, it is cheaper to buy a whole long block from the junk yard. Its cool to have the edelbrock Garb around your engine bay, but sometimes, as it looks in your case, its not worth the messing around, especially if you only want minimal power upgrades.
Tuned
Joined: Mar 2004
Posts: 265
Likes: 2
From: Georgetown, De
I have a '67 C-code 289 that I'm fixing up. It's basically all stock now, but I will be putting an Edelbrock Performer RPM intake and 600cfm carb, and headers on it with dual 2.25" exhaust. What kind of hp and torque should I be seeing? How streetable is the Performer RPM cam on stock valve springs? Will piston clearances be an issue? How will it idle? This motor is going into my brother's '84 Capri.
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Elder User
Joined: Nov 2004
Posts: 726
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From: So. California
what is the most carb I can put on a 302 with 9.5:1 comp and a cam with max torque at 2500-3500I hace seen at Edlebrock a 302 dyno with over 300 lbs at 4500 I think I want to get that same amount of torque at lower revs. I am talking flat torque curve between 2500-4000.
Postmaster
Joined: Dec 2004
Posts: 2,941
Likes: 30
From: Maple Valley, WA
Get a 600cfm holley, performer intake, and an RV cam. I have the same setup in my maverick right now with stock manifolds and dual exhaust and it will light up my 275/60-15's all the way down my street, and I only have 3:1 gears.
More Turbo
Joined: Oct 2004
Posts: 621
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From: Marana, AZ
Just use the same setup I told you about earlier, just substitute the 500cfm edelbrock with the 600 or 650cfm edelbrock. Its best if you keep everything matched, its designed that way. I don't know about the Holly, but the Edelbrock carb, you can change or service the needle/seats or change the jets without having to remove the carb from the engine which is nice.
More Turbo
Joined: Oct 2004
Posts: 621
Likes: 2
From: Marana, AZ
Is that just your opinion or do you speak from experience? Our mustang group runs them all the time on the strip and they work great. Holley is a good carb also, no disputing that.
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Postmaster
Joined: Dec 2004
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From: Maple Valley, WA
Originally Posted by desertdave35
Is that just your opinion or do you speak from experience?
More Turbo
Joined: Oct 2004
Posts: 621
Likes: 2
From: Marana, AZ
The major differences between the 2 are, the edelbrock is designed to run right out of the box, will stay tuned a lot longer than the holley. They use metering rods instead of jets which last longer. All gaskets are above the fuel line to prevent leaking. In a test done by 4x4 offroaders, the edelbrock out performed the holley in all aspects of climbing, traversing 45 degree angles and very rough, bouncey terrain. The holley stalled and loaded up on these test.
On the other hand, Holley is an easy carb to tune, for precise mixtures and has a much more powerful response on 1/4 mile racing. The Holley has bigger fuel bowls also which is nice. But if its not a daily driver the holley gaskets tend to dry out and then leak when fuel is intoduced again.
Hey both carbs are great and have their place, no doubt. But the original question was for a Scout engine, so my thoughts were he would be off roadin this rig, I wouldn't recommend a Holley for that.
On the other hand, Holley is an easy carb to tune, for precise mixtures and has a much more powerful response on 1/4 mile racing. The Holley has bigger fuel bowls also which is nice. But if its not a daily driver the holley gaskets tend to dry out and then leak when fuel is intoduced again.
Hey both carbs are great and have their place, no doubt. But the original question was for a Scout engine, so my thoughts were he would be off roadin this rig, I wouldn't recommend a Holley for that.
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Elder User
Joined: Nov 2004
Posts: 726
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From: So. California
Get a 600cfm holley, performer intake, and an RV cam. I have the same setup in my maverick right now with stock manifolds and dual exhaust and it will light up my 275/60-15's all the way down my street, and I only have 3:1 gears.
what size rv cam so you run? I am planing to cam mine 4500-5000 max rpm and set the lobe seperation angle so peak torque is 2500-3500 rpm, I will also run headers, will a big carb hurt low end torque? do you run vacume secondaries or mechanical seconaries, which is better for performance?
I understand that the wider the lobe seperation angle the mere vacume will be created. Is it true the more vacume the more cfm I can put in that engine?
what size rv cam so you run? I am planing to cam mine 4500-5000 max rpm and set the lobe seperation angle so peak torque is 2500-3500 rpm, I will also run headers, will a big carb hurt low end torque? do you run vacume secondaries or mechanical seconaries, which is better for performance?
I understand that the wider the lobe seperation angle the mere vacume will be created. Is it true the more vacume the more cfm I can put in that engine?
Postmaster
Joined: Dec 2004
Posts: 2,941
Likes: 30
From: Maple Valley, WA
My cam is around 204/214 duration@ .050 and .470 lift with a 112 or 114 lobe sep. You would want to have vacuum sec. because it will help you keep a little bit of torque youd lose with mech. The lower the lobe sep. the less vacuum you will pull at idle but it makes your engine scanvenge better at higher RPMs resulting in more horsepower, but it makes fuel puddle up at lower rpms because of the lack of velocity in the intake, this results in lower torque and poor gas mileage. If I were you, Id go with an Edelbrock Performer intake, holley 600cfm vacuum secondary, mill your heads .020", get a cam like mine, headers, and you should be good for 250-275hp 325-330tq at around 3500.