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Compression or RPM

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Old Jun 7, 2005 | 05:02 PM
  #21 (permalink)  
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First, get yourself a game plan. Figure out how fast you want your car to go, how much money you have to spend, and how often you will be driving the car on the street. Then, you will be able to form a plan of attack and start buying parts. Like Derek said, you don't want to be buying parts over and over. Do it right the first time and you will be happy with your results. My car sat for 2 years before I got it running again. Now, I smile every time I fire it up.
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Old Jun 7, 2005 | 05:13 PM
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Originally Posted by vip18971
I'm figuring on low 11:1 compression, I guess I should keep the RPMs down to about 6.5k...A victor Jr. and AFR 185s with some new springs will do that nicely, at least the company advertises that. Cooling I can only imagine will be a bitch, but I'll get a decent cooling system. Haven't decided on a cam yet, so not sure on that. I guess 11:1 compression and a 6.5k shift point would be a decent goal...
You will do fine with that setup. 6.5 is ok with a stock block. The girdle will help you too. When I heard high revving, i thought you guys were talking about 8000 rpm or something
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Old Jun 7, 2005 | 05:32 PM
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Originally Posted by vip18971
I see, so high compression/high revving = a lot of blown gaskets? What gaskets are we talking here, headgaskets left and right?

If you can't mix 'em, then which would you say is better to have, you seem like you know your shit about Stangs.
For me it did. Car ran great for a month at a time, great temp wise, sat at 180 all day all night, then it would lose another gasket. People have ran more compression than me and did fine, I believe mine was in the mid 11-12 range. edit: Felpro 1006 Metal O-ringed gaskets.

You can run both, but remember high rpms mean more stress on your parts and a stock block will only take so much abuse spinning 6500+ rpms. Having expierienced both high revving power and a solid low/mid range setup I've decided a lower compression setup that makes great low and mid range power is more to my liking for a street car. I did love watching my tach pull hard to the limiter and be begging for more, but the lack of low end that comes with a high reving n/a motor is not something I grew accustomed to.
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Last edited by TheShow50h; Jun 7, 2005 at 05:39 PM.
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Old Jun 7, 2005 | 06:19 PM
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Originally Posted by T/S #25
My car sat for 2 years before I got it running again. Now, I smile every time I fire it up.

god, i hope thats not the case for me...... this shit takes forever
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Old Jun 7, 2005 | 07:36 PM
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same thing I ran into (with some extenuating circumstances, like a child being born, etc..) but it sat for a year before I got it going again.. it'll be the same issue with the Fastback.. but will be worth the wait, as I'm sure yours will as well Steve..
Joe, you put the bottle on that thing yet?
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Old Jun 7, 2005 | 07:55 PM
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Go test out an NA 4v Cobra and then drive your 5.0 right afterwards and decide.. It's amazing how different they feel. I used to drive my friends Vortech'ed 5.0 all the time..and holy shit I would shift at like..1500rpm and be flying.. in my Cobra if I'm not doing at least 4k rpm I'm puttputting around town

Now of course it wont be THAT significant, but youll get a feel for low torque vs revving..

and I just realized you were going to spray, so ignore most of what I said before.. ha.
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Old Jun 7, 2005 | 08:02 PM
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i'll be doing a high comp 331 with nitrous eventually
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Old Jun 8, 2005 | 03:35 AM
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No bottle yet Derek. I want to get it sorted out N/A before I go that route.
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Old Jun 8, 2005 | 05:20 AM
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just remember combo is everything and think it thru on which way you want to go. Mid eighties before Fords even had much of a aftermarket in engine design we ran a 289, 12-1, 620 flat tappet crane, 351 windsor heads, twisted torker, 750 Dp, 5:13, nash 5 spd, slicks in Maverick 11:30's in 1/4 na. Back then the chevy guys swore we had nitrous on that lil car. lol. Now with maybe if we had some aftermarket heads who knows maybe 10's back then. oh yes around 7600-8200 for over 5 seasons and then sold the motor to a street racer who ran it for another couple of years. Choose your machine shop carefully and engine builder.
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Old Jun 11, 2005 | 07:21 PM
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Originally Posted by vip18971
Don't get it. Blow a lot of gaskets, or are you asking me if I'd like some cookies?
If anyones making cookies PM me and I'll give you my addy.. IM always down for some cookies that someone else makes....
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