Author Topic: 6 cyl k88 style questions  (Read 1160 times)

Offline Goinbroke2

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6 cyl k88 style questions
« on: February 15, 2018, 06:26:50 PM »
Kid finished with the junior last year, wants to go big car this year. My mustangs not ready and won't be due to a million things.

Then the fed bug hit and I can't get it out of my mind. Have a 4cyl FED as a screenshot on my computer now. lol.

So, short wheelbase 100-125"
300/c4/9"
k88 type or something similar

what weight would I be at? (approx. obviously)
How much power will I need, pro class is 11:50 - 13.50. Don't want to go faster (super pro) as that's our electronics class.

Yes I've built a poop load of race engines, have tube benders/mig/tig/engine building tooling/etc
Thinking 230*@.050 cam/4bbl/porting and head work, just a mild torque engine max at 5500-6000.
3000stall converter and I have everything from 3:00-3:50-4:11 and 4:86 gearsets

Am I out to lunch or have any semblance of logic here?

Offline Goinbroke2

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Re: 6 cyl k88 style questions
« Reply #1 on: February 15, 2018, 06:29:08 PM »
Forgot to add I have a 54 dodge front axle I was thinking of using unless you guys think a round tube axle would be better/lighter/etc?

Offline denverflatheader

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Re: 6 cyl k88 style questions
« Reply #2 on: February 16, 2018, 07:17:58 AM »
Goinbroke2 - posting in Six Cylinder section so we assume 300/c4/9Ē means engine is a Ford 300 six.  Iíve read before the stock 1960s Ford 300 six weighs less than a stock 1960s sbc.  The c4 weighs more than a pg, perhaps your engine/trans combo will weigh similar to a sbc with pg in race trim.  Weight guess without driver, 1250lbs with that solid 54 Dodge axle.
 
If you have the 54 Dodge axle and associated parts (i.e. spindles, wheels, steering) in good usable condition, move forward with that choice.  Thatís how things were done back in the day and will make your K88 replica more yours and more distinct.  Like a bad puzzle, up to you to make it work well and look attractive.  When others are checking it out, could be a reflection of how much talent you have or donít have : )

The stock and/or slightly modified Ford 300 six isnít a high rpm engine.  With your planned engine modifications, close to one hp per cubic inch is possible.

A 3000 stall convertor is probably on the light side, your modified engine/trans combination might enjoy a higher; like 4500-4800 rpm stall convertor to help you achieve that 11.50-13.50 et.  With a c4 trans and 2.46 low gear, Iíd select a 3.70-3.90 rear gear ratio with a 29 inch tall rear slick to start.  After a few passes, you will know what to change the rear gear ratio to permanently.  Alan


Offline Goinbroke2

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Re: 6 cyl k88 style questions
« Reply #3 on: February 16, 2018, 08:41:57 PM »
Thanks for the reply!
Yes 300 ford six. 1250# great, thatís a general idea I can work with. Not being a rpm fan I was thinking 6000 would be max(if that, depends on head flow) regardless, I have something to work with.

Ran a very successful 300/e4od/8.8 f150 in Street class years ago and was very impressed with its consistency. Iíve got a 302 crate engine as well as a couple 460ís if I wanted to go faster, but bracket racing this six would be different and fun.

Thanks again for the reply, time to crunch some numbers.