My 302 build for the Challenge Race Car - cam question? April 06, 2008, 08:12:36 PM OK, a little background. That 84 Turbo Coupe I made John drag home last year finally has a purpose in life. We're turning it into a race car for the Grassroots Motorsports $2009 Challenge. For those of you not familiar with the Challenge, you have to build the entire car for $2009 or less (and be able to prove it), and it has to compete in a 1/4 mile drag race, a timed auto-cross course, and a judged concourse. Obviously a heavy-butt TBird with a 302 isn't the "hot" setup, but it's what we have, what we're familiar with, and our goal is simply to finish and still have a running car. That being said, we do still want to give it our "best shot" and maybe even eek out at least a Top-10 in the drag race.OK, so the motor is a roughly 84 vintage 302 CFI with a hydraulic flat-tappet cam that's all of 150HP (maybe...). Obviously a rebuild is in the cards!So I was at the Portland swap meet today and I picked up a new "regrind" cam for the 302 (for $35!) from a fairly well-known shop. Specs are as follows:INTAKE:.439" lift 207* @ .050 258* advertisedEXHAUST.454" lift215* @ .050265* advertised115* LSA, 36* overlapAnd it's a 351 firing order.So, is this going to meet our needs? The plan is to acquire a set of GT40 (non-P) heads, an RPM Air-Gap intake, and higher-compression pistons for the build. Nitrous is the current plan for a power adder, but we are kicking around the idea of turbo/blower... Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #1 – April 06, 2008, 09:22:47 PM Would be a good cam to pull a boat with..Im doing a similar setup in my 351 and im going to use this camhttp://www.jegs.com/i/Lunati/638/61003LK/10002/-1 Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #2 – April 06, 2008, 10:36:35 PM 1.7 rockers intake 1.6 exhaust. I know it sounds bass ackwards, but I've been doing some research and it seems High lift, short duration intake/lower lift, longer duration exhaust is the way to go with GT-40 heads. Quote36* overlapAt what height? 0? .050? Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #3 – April 06, 2008, 11:05:28 PM Here's the cam card:Advertised Lift: INT .439 / EX .454Advertised Duration: INT 258* / EX 265*Lobe Separation: 115*Overlap: 36*Exhaust Opens: 43* BBDCExhaust Duration: 215*Intake Opens: -11* BTDCOverlap: 19*Exhaust Closes: -8* ATDCIntake Duration: 207*Intake Closes: 38* ABDCSo I assume it's 19* Overlap at .050 and 36* Advertised. Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #4 – April 06, 2008, 11:11:29 PM Seems to be about the same as:http://store.summitracing.com/partdetail.asp?part=CCA%2D31%2D416%2D3&autoview=sku Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #5 – April 07, 2008, 02:08:18 PM It's too small isn't it? Maybe with ported HO heads it will work, but 300HP might be a stretch for it... Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #6 – April 07, 2008, 04:29:22 PM I belive this one is fairly popular and cheap...http://store.summitracing.com/partdetail.asp?part=SUM%2DK3601&autoview=skuDuration is similar to the Stg 1 Trick Flow roller I run... With 1.7 rockers it would have approx .500 lift and with good springs should pull to 6000... Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #7 – April 07, 2008, 06:08:28 PM If your buying pistons, match a cam with them.That way you get the most bang for the buck.Are you putting $2009 in motor or everything? Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #8 – April 07, 2008, 07:19:21 PM $2009 for EVERYTHING, car included. That's why the budget is so short! :hick: Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #9 – April 10, 2008, 10:52:49 PM Quote from: P71;212997$2009 for EVERYTHING, car included. That's why the budget is so short! :hick::mullet: Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #10 – April 11, 2008, 10:02:41 AM Mullet budget! I love it :hick: Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #11 – April 11, 2008, 11:02:55 AM Quote from: P71;213554Mullet budget! I love it :hick:Mullet Budget = Stolen parts + $5 for PBR? Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #12 – April 11, 2008, 01:02:32 PM This is the race I would shoot for with a T-Bird: http://www.24hoursoflemons.com/ Would do pretty well stock. $500 budget (+safety costs including mandatory cage) Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #13 – April 13, 2008, 10:04:22 PM Safety costs are not included in that $500 Bux. A cam would be though. It's also a $500 registration fee PLUS $100 per driver. This race IS NOW a true 24 hour event. To do it I would say 6 drivers (4 hours each) so that's $1100 plus a car ($500) plus tires, a rollcage, a harness style seatbelt and GOOD brakes. Truthfully I'd budget at least $4K for that one. It would be a BLAST though. Quote Selected
My 302 build for the Challenge Race Car - cam question? Reply #14 – April 13, 2008, 11:23:40 PM Quote from: V8Demon;213853Safety costs are not included in that $500 Bux. hence the "+safety costs" :) QuoteTruthfully I'd budget at least $4K for that oneProbably. Jalopnik is running a 302 powered Volvo 244. Someone is even entering a Buick V6 powered Triumph TR7. There is quite an eclectic band of cars at these events (ex: Porcubimmer - the BMW with the pen 15s on the outside for a change :) ) and the themes are quite amusing. Not too mention the fun stuff like the Personal-Injury-Lawyer Anti-Slalom, the Marxist-Valet Parking Challenge, and the Wide Open Throttle Rodthrowapalooza. Plus the prize money is paid in nickles! Lots of fun stuff. When I found out about it, I was hooked and have been reading as much as I can from teams getting their cars ready. I even dreamed of entering lured by the $500 budget...but as you say, costs rise pretty quickly and I'm quite far from any of the race sites. Anyway, sorry about the thread hijack, I just think the 24 Hours of LeMons is really cool. Quote Selected
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