ANY ONE USING THIS COMBO!!!!

[vj]

I'm having problem burning pistons right now I have a s.b.c I'm using wiseco pro tru pistons -20 reverse dish. When I get to 1/8 mile mark I 'll burn a piston. I runing a 850 csu carb. and kevin have set me several things to try but when I make a blast it burns a piston. On the last try I even used my water/alky kit and the same thing happened. I have a P.E. fuel system and I've tried everything I no. Some one told me that I need a set of piston with a 2018 alloy I found out that the wiseco Pro Tru have a 4032 alloy will this make a different or is it something else wrong.

Now my original ? since the motor is down and I have to buy more pistons I was wondering if any one run a 421 or 434 s.b.c std deck hieght. I know that the comp. hieght is 1.063 and a 1.00 I might switch to a 5.850 rod because that not alot of room to play with but I just want to get a few extra cubes. if you running this combo what is the pro's and con's of it!!


Thanks

[NoSlo5.0]

too much timing???What controller do you have??How much are you running??What gas??C16???What jets in the car...What regulator you running??

[Zeke1]

Do you burn the same cylinder every time?

[vj]

I had 80 primary and 94 secondary. I run my timing on 31 total if I go lower the motor don't mke power at all. to show you the difference I ran my first pass @28 60ft. wass 1.54. It tookof like a turtle. The next pass all I did was moved the timing to 31 and sixty ft. went to 1.32. I know several guys who runs more timing than 31 and have no problems. regulator is P.E. my car is curently running 12volt I thought about upgrading to a 16 volt but don't think it would help much I run 2 batteries. gas is 118 phillips do't have c-16 my way I'm tring to find someone who sales it.

[Ron Clevenger]

When you say your burning pistons....?? What exactly does that mean....lifting ring lands or actually torching through the crown or side..??

Personally I prefer the JE parabolic dished blower pistons. Get your tune up right and you will not need any additional inches. If you get the stroke to long it will be difficult to get a good blower ring package designed due to pin location.

Tells us a little more about your tune up, we might be able to help with more info. Cam design is criticle in making this gas blow through deal work. What's the cam look like? How much boost?

Blessings.........Ron Clevenger.

[vj]

They are tourchng the pistons burning though pistons, rings etc. cam have a 114 lobsperation custom grind by comp cam I'm going to get a new set from je and try it again the first of the year. boost is around 24pds.

[Ron Clevenger]

I suggest you call Harold Brookshire 662-301-1245 and rethink the cam lobe seperation for a blown "gas" engine. He can put together a cam design that will help get the heat cycle down. I would suspect in your SBC with a 114 your going to have a tough time getting a piston to live with any kind of boost and power.

That's my thought's anyway...........Blessings..........Ron Clevenger.

[fst3rdgen]

What supercharger are you running and how much boost? Have you ever checked inlet temps?

[Ed-vancedEngines]

It is hard to know just with the furnished information but it is possible you need to open your exhaust valve sooner before the pistons, rings etc get heat soaked. Actually that is very likely. Also with Forced Induction like with N2O you need to get rid of the heat fast. Opening exhaust valves sooner will do that. If it is not a turbo try to scavange exhuast quickly with a short tube but large primary.

I do agree with Ron and if I were you I would be trying to find a cure before just installing new pistons. Another thing do not run a tight quench with a blower engine. Get the piston away from the head.

Ed

[nos81bu]

I suggest you call Harold Brookshire 662-301-1245 and rethink the cam lobe seperation for a blown "gas" engine. He can put together a cam design that will help get the heat cycle down. I would suspect in your SBC with a 114 your going to have a tough time getting a piston to live with any kind of boost and power.

That's my thought's anyway...........Blessings..........Ron Clevenger.

i would say your running to much timing or your inlet temps are way too high...
if u need timing with your 60 foots add timming out of the gate then retard it with additional boost..your going to need the msd programmable box to do this

RON,i run a 114 cam from steve morris and i luv mine,makes power and boost

[NoSlo5.0]

C16 the ONLY fuel to run with a nonintercooled supercharger..I ran 30 degrees of timing in my 347 and never burned anything up my cam was on a 115 lsa and it liked a looser converter to 60foot correctly..I tried a tight converter and more timing but it didnt run as quick as it did with the looser converter..good luck,Rog

[chris406]

I'd be leary of the Product Engineering fuel system. There have documented cases on www.turbomustangs.com where those pumps and regulators have caused problems.

[Mike Coffey]

I'd be leary of the Product Engineering fuel system. There have documented cases on www.turbomustangs.com (http://www.turbomustangs.com) where those pumps and regulators have caused problems.I use Product Engineering pumps and regulators and so does Jim with great results and great customer support, and I street drive my junk too!

[outlaw68]

I would switch piston companies. I just have never had any luck with the wiesco, and the pro true is even cheaper. I know lots of guys have ran them, but those pistons dont live in my stuff. I have had failure with wiesco N/A.

[OLDHEAD]

I would like to help you....I just took my engine apart after 7000 street miles avd over 100 runs and every thing looks new....My 80 BU goes 8.7s at 157......And weighs 3525#....I think your problem is fuel delivery....I have a boost ref. pressure switch on my carb. fuel inlet....If the pressure drops below 8# over the bonnet boost it changes the RPM. chip from 7200 to 3500 and lights a big red light next to the tack......This was save the engine for me when running low on race gas....I have a small block chev. 400,7.8 comp.,5.700 rods,dart stock height Carbshop carb.(70-88 jets.with the power valve channels drilled),Locked dist. at 32 degs. the boost is 21 1/2#,and I have nitrous (150hp)which dynos 1135....I am turning up the boost and spraying more this season....I have 40 years of blown cars,I know what works....If you would like to talk on the phone, leave a message on godragracing.com......:) :) :) :) OLDHEAD