302 chevy

[Brian Lohnes]

Re: 302 chevy

Just illustrating Keith's point about nitrous.



Brian

[SpiderGearsMan]

Re: 302 chevy

oh , but when you got enough fuel - nitrous is oh so sweet
don't leave home without it !!!

[KeithTurk]

Re: 302 chevy

Brian... I've never been "That" far off.... normally I'd just heat saturate the center of the piston and it would melt threw in the valve pocket area... Pour a little oil in the top of the motor and make big stinky's and scare the poo poo out of you since you were most likely at speed...

I've also had some valve seat issues.. seems valve seats don't like to be heat saturated either..

The real key to success with Nitrous for me was watching the EGT gage.. if it spiked down when you turned the Nitrous on...l you were on your way... otherwise... the race was how fast you could get your finger off the button... could you beat the damage???

Nitrous is one of those things that has to be instantly perfect... or not at all... if it doesn't work instantly it's killing Something...

K

[SpiderGearsMan]

Re: 302 chevy

if the temp spiked high - then you are really burning stuff up

[walt reynolds]

Re: 302 chevy

I have read that NHRA stock racers Ben Wenzel and Jerry McNeish running 302 stock class turn 8200 t0 8700 rpm. I have a photo of Ben Wenzel's Camaro but I have to figure out how to shrink it down!!

[SpiderGearsMan]

Re: 302 chevy

bob broadbent in nh sets a lot of records with his dz motor

[Eric68]

Re: 302 chevy

Gee, I actually get off the computer and go racing and I miss like 3 pages of this thread! You guys need to get out more ;) LOL

revs didn't cause that = lean out did
I watched my nascar friends with turbo heads run those at 8500 all day - floating the valves on the straightaways
lets not be so brutal to the sbc

If that was done on N2O my vote is for too rich. ;) N2O is a funny animal, too lean and you melt the piston in the center, too rich and you melt down the ring lands.

I still stand by my statement that a STOCK DZ 302 was in the low 300 HP range. The key to unleashing their power was to dump the factory manifolds and put headers on them Then they would rev better and could perform in the RPM band they were designed for.

Some tuning time on a dyno with a stock (including manifolds) DZ302 might net a little more power (maybe mid-300's) but not much IMO.

[TC]

Re: 302 chevy

Just look at it this way, most guys I've seen talking about their Camaro's with DZ302's, that are running stock classes say their cars run around a 14+/- second quarter mile. Also the Factory rating on a DZ302 was 290hp. So figuring that a '69 Camaro weighs 3400lbs with driver and has 290hp, if you do the math, it puts the car at a 13.9 second quarter mile. So by the times people are running, it would seem that a DZ302 in stock form makes around 300hp.

[Junk Whisperer]

Re: 302 chevy

2 of the Landlord's 7 '69 Z's has the 'Dealer installed'(these were shipped in the Car's Trunk...)Headers along with the famed "Chambered-Exhaust"(or "Off-Road" Exhaust...). Power-wise,He hasn't a clue & I really don't think the Man cares too much about it. I'm just wonderin' "what" 302 my own '68 Z had in it when it was together. ~J/W-OO6.

[SpiderGearsMan]

Re: 302 chevy

1968 used the MO 302
do you live on the grounds of an auto museum ?

[Junk Whisperer]

Re: 302 chevy

No I don't. And these Muscle-Cars aren't "musuem quality". Actually,NO Musclecar should be in a Museum...too new. 40 years old isin't 'old'. ~J/W-OO6.

[nosnerd]

Re: 302 chevy

Gee, I actually get off the computer and go racing and I miss like 3 pages of this thread! You guys need to get out more ;) LOL

revs didn't cause that = lean out did
I watched my nascar friends with turbo heads run those at 8500 all day - floating the valves on the straightaways
lets not be so brutal to the sbc

If that was done on N2O my vote is for too rich. ;) N2O is a funny animal, too lean and you melt the piston in the center, too rich and you melt down the lands




I still stand by my statement that a STOCK DZ 302 was in the low 300 HP range. The key to unleashing their power was to dump the factory manifolds and put headers on them Then they would rev better and could perform in the RPM band they were designed for.

Some tuning time on a dyno with a stock (including manifolds) DZ302 might net a little more power (maybe mid-300's) but not much IMO.

agreed...been there done that on a LS7 back in 97...

agreed again....

85 + posts onthe Dz...never woulda thunk...

[SpiderGearsMan]

Re: 302 chevy

the piston melted -too hot - lean out

[Eric68]

Re: 302 chevy

You can hurt 'em too rich too on N2O.