looking for some opinions on launch/60ft times

[ky66ss]

This is my 2c on some of your problems

Your duration a .050 is low that's is one problem you have with slowing down after 6500rpm.That cam is only good for about 6000 then it starts to die off,Your going to need a cam with more duration and a closer lobe Separation.for duration in the upper 250s and the lobe less then 110 something like the cams i put in the post


and this is your cam spec
http://www.summitracing.com/parts/sum-k1107

this is what i use in sbc and even on the street

http://www.ebay.com/itm/3-Solid-Cam-Lif ... 27cbc1bd48


the 6000-6500 area is about as far as i like to turn a 350 anyway ....this car is mainly a race car i drive it on occasion im not a fan of solid cams as ive only had a couple and never got the knowledge on them as i have for hyd. cams ive got a solid roller in a car i just bought im tuning with it now maybe ill get the hang of the solid lifter cams with it.....as of now the cam im leaning to the most has a 108 lobe sep. and 246/253 duration @ 0.50 over 110 lobe .235/.243 @50 i have now
here are the specs on my cam im running
http://www.skipwhiteperformance.com/det ... =110041-10

 

[Kwik_Cutty88]

What tires and suspension work do you have done? Right now you are running about the same 60ft's as a stock '06 2500 HD, just for comparison. :lol:

 

[ky66ss]

90/10 shocks up front 50/50 in rear adjustable upper control arms and boxed lowers with grand national rear sway bar 28/10/15 slicks

 

[ky66ss]

ive talked with all the cam companies and everybody says i need a whole lot bigger cam with my heads also been told to leave it alone and up the carb to the 750 and let it be .....ive given alot of thought and took everything ive been recommended about this ive got a chance at a set of aluminum heads that are similar to what i have now same valves, springs etc but they are 190cc would this smaller head bring my current combination around as it seems the 210cc heads are the problem as most say.....i can swap heads for less than i can swap the cams......whats your thoughts?

 

[GhettoRacingKid]

Got any video?

Is the car hooking?

Have you tried launching at a lower rpm

I bring the motor to about 1200 rpm and launch it.

My converter is a lot bigger. But you should see better 60ft times.

My best is a 1.450. And in consistently around that area. Im at 3400+ lbs

 

[lilbowtie]

You simply have too big of runner for that size engine - you need runner volocity.

 

[MPac]

I reccomend the cam and carb change if you want to use the heads as I've mentioned before but if you can go with a smaller head then do it. Alot of people make mistakes when choosing heads. The go off of what they flow which is not what you need to go off of. Port veloctity is more important. If you blow air out of your mouth it empties out fast and isn't very powerful. If you blow through a straw it's smaller but is more powerful. If you could get a set of 195's that would be perfect. But if the 190's are your only option and you can afford it go for it. Then dissamble your heads and do some bowl blending and cleaning up the runners. It'll add another 20ish horse for not much work. Your going to deffinatly be happier with 190's because you'll get a stronger launch since you'll have more down low torque. Hold on to your 210's if you can though. Every race eventully wants to go faster so no reason to get rid of them when you could use them down the road. I still think you will be under carb'd with the 190's. Consider a 750 still.

 

[larryo454]

try this.

http://www.4secondsflat.com/Carb_CFM_Calculator.html