huge RPM

vetteeatr · 10-15-2001, 07:56 PM

Okay i had to start thinking about a motor that woul dbe able to rev to around 7200 RPM and survive. I am plannign on getting the victor intake(good idea)(anyoen knwo powergains wiht this beast?) I have windsor senior heads wiht 2.05 and 1.60 valves and abotu to get them ported and polished 36 ibs injectors, harland sharpe rockers, (I NEED A CAM ANY SUGGESTIONS) and some 1 5/8 bbk full length and all this littel crap.

Also could someone explain race motors over street motros and the benifits and how it hurts drivability? THanks

vetteeatr · 10-15-2001, 10:09 PM

anyone?

silver_pilate · 10-15-2001, 11:04 PM

Well, it all depends on your budget.

I'd say that 7200 rpm is past what a stock 302 block can stomach. So figure you're going to need an A-4 or similar block. You'll also want to put a main support system on there.

Give us a bit more about what you want to do with this motor and why you want to rev so high.

--nathan

------------------
--silver_pilate

'91 GT, Built 306, Wolverine 1087 cam, ported Windsor Jr. Irons, and all the goodies...click the link to the left to see a full list of my mods...

Tried and True 302 Being Built to Outrun You! heh heh heh...
--Texas Panhandle
_
_ l ~--
\ , *_}

Unit 5302 · 10-15-2001, 11:05 PM

Well for the race vs street motor it's pretty simple.

You will be giving up idle quality, low end power, fuel economy, linear power increases, and long life for a very powerful engine.

I don't know of many EFI intakes that will support 7200rpm, although the 302 can certainly take it. One of the problems with running the 302 to 7200rpms is lifters. You can either get some seriously strong springs and do alright with hydraulic lifters (not stock ones), or you can go to a rolid roller cam. As for the cam specs, forget about lift, you're gonna need quite a bit of duration. You can only have so much lift without piston clearance problems, and you'll need most of what you can get. Plus having a high lift cam robs horsepower. The higher that valve lifts, the more power that cam is using to move the valvetrain, and with the serious springs and lifters you're gonna have to run, it'll be a big power drain.

You will need to have the engine balanced, and I would recommend a very good NHRA approved harmonic balancer. A windage tray and a deep oil pan is probably a real good idea, or a dry sump oiling system. Running high rpms can whip your oil into a froth, and that is not something you want to do with a race engine. There are all kinds of things that can be, should be done to a high rpm engine. Don't skimp on parts. If you do, you will pay the price.

vetteeatr · 10-15-2001, 11:25 PM

well i wanted alot of horsepower and i was under the imopression race motors rev alot higher.. I just assumed the higher reving engines have worse power down low because the airways are to large and pick up at he top. Im actually thining a little to high more so around 6500 actually. I want some street driveabiilty but my heads are made for alot mroe of the race aspect. So basically i want a high horsepower motor awiht max power up top so i can get traction down low. Also i kinda want to break some speed recordds of my own. :P I beleive my heads are in the range of around 1500 to 6500 or so but not sure. Ive heard alto of good stories abotu teh holley itnakes but not really sure wha tot get... the bigger thing is the cam(im clueless here) and the intake the victor is actually a little to high on the RPM band really i think but was just guessing.

10-15-2001, 07:56 PM	#1
vetteeatr Registered Member Join Date: Apr 2001 Location: Olney, Illinois, USA Posts: 212	huge RPM Okay i had to start thinking about a motor that woul dbe able to rev to around 7200 RPM and survive. I am plannign on getting the victor intake(good idea)(anyoen knwo powergains wiht this beast?) I have windsor senior heads wiht 2.05 and 1.60 valves and abotu to get them ported and polished 36 ibs injectors, harland sharpe rockers, (I NEED A CAM ANY SUGGESTIONS) and some 1 5/8 bbk full length and all this littel crap. Also could someone explain race motors over street motros and the benifits and how it hurts drivability? THanks

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10-15-2001, 10:09 PM	#2
vetteeatr Registered Member Join Date: Apr 2001 Location: Olney, Illinois, USA Posts: 212	anyone?

10-15-2001, 11:04 PM	#3
silver_pilate DURKA DURKA!! Join Date: Sep 1997 Location: Lubbock, TX...(TX panhandle) Posts: 1,418	Well, it all depends on your budget. I'd say that 7200 rpm is past what a stock 302 block can stomach. So figure you're going to need an A-4 or similar block. You'll also want to put a main support system on there. Give us a bit more about what you want to do with this motor and why you want to rev so high. --nathan ------------------ --silver_pilate '91 GT, Built 306, Wolverine 1087 cam, ported Windsor Jr. Irons, and all the goodies...click the link to the left to see a full list of my mods... Tried and True 302 Being Built to Outrun You! heh heh heh... --Texas Panhandle _ _ l ~-- \ , *_}

10-15-2001, 11:05 PM	#4
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Well for the race vs street motor it's pretty simple. You will be giving up idle quality, low end power, fuel economy, linear power increases, and long life for a very powerful engine. I don't know of many EFI intakes that will support 7200rpm, although the 302 can certainly take it. One of the problems with running the 302 to 7200rpms is lifters. You can either get some seriously strong springs and do alright with hydraulic lifters (not stock ones), or you can go to a rolid roller cam. As for the cam specs, forget about lift, you're gonna need quite a bit of duration. You can only have so much lift without piston clearance problems, and you'll need most of what you can get. Plus having a high lift cam robs horsepower. The higher that valve lifts, the more power that cam is using to move the valvetrain, and with the serious springs and lifters you're gonna have to run, it'll be a big power drain. You will need to have the engine balanced, and I would recommend a very good NHRA approved harmonic balancer. A windage tray and a deep oil pan is probably a real good idea, or a dry sump oiling system. Running high rpms can whip your oil into a froth, and that is not something you want to do with a race engine. There are all kinds of things that can be, should be done to a high rpm engine. Don't skimp on parts. If you do, you will pay the price.

10-15-2001, 11:25 PM	#5
vetteeatr Registered Member Join Date: Apr 2001 Location: Olney, Illinois, USA Posts: 212	well i wanted alot of horsepower and i was under the imopression race motors rev alot higher.. I just assumed the higher reving engines have worse power down low because the airways are to large and pick up at he top. Im actually thining a little to high more so around 6500 actually. I want some street driveabiilty but my heads are made for alot mroe of the race aspect. So basically i want a high horsepower motor awiht max power up top so i can get traction down low. Also i kinda want to break some speed recordds of my own. :P I beleive my heads are in the range of around 1500 to 6500 or so but not sure. Ive heard alto of good stories abotu teh holley itnakes but not really sure wha tot get... the bigger thing is the cam(im clueless here) and the intake the victor is actually a little to high on the RPM band really i think but was just guessing.