Calling all boosted STOCK ENGINE 3v's

Jbarker83 said:

i went back to stock cams to reclaim low and mid end power blower makes plenty of top end. i am putting it on the dyno tomorrow see how much i lost peak going back to stock

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bmeaggie said:

Yep this.

It’s all about tuning and if possible run ethanol to keep her burning cooler. Run ethanol and have a good not-too-agreesive tune and you’ll never see detonation and never have a problem.

I would recommend VMP tuning service to anyone with a 3V... only service I’ve ever used and the car has run perfectly every time they’ve tuned it for me.

All this said, I’m still going to build my engine with forged rods, pistons and billet oil pump gears soon because I have even higher power levels in mind for future... or if I ever want to sell her, having all the difficult and expensive things already done will be more attractive to other enthusiasts.

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BlackGT450 said:

Wow those are some incredible numbers. I am about to install a DoB manifold and GT500 blower with the 2.875" pulley which is slightly more boost than he recommends for a stock block. I may have to use VMP tuning. I am in Tampa so it's only a couple hour drive from me.

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Sactown said:

At 490rwhp 9-10psi the car was fine, pushed the boost up over 12-14psi windowed the block it at the track on 100octane race gas, it happens even with a great tune, no issue now with the built motor pushing 24psi.

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Pentalab said:

How is tuning going to save you from the pretzel stick connecting rods ?? Depending on how often the blower is used, and if revved to the moon, the rods will eventually succumb to metal fatigue. The only way I can see tuning to save the engine, might be to reduce timing in the midrange, which will reduce midrange tq.

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MrAwesome987 said:

I question how much and how hard you guys drive these supposed 650whp stock block cars...

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thump_rrr said:

This over 2,000 times. Probably closer to 3,000.
It gets driven hard every time I take it out.

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Jbarker83 said:

i went back to stock cams to reclaim low and mid end power blower makes plenty of top end. i am putting it on the dyno tomorrow see how much i lost peak going back to stock

Click to expand...

bmeaggie said:

Wish I was that close... I’m in Texas so have to do the repetitive log-email-log-email-log-email... thing until the tuner is happy with what he sees.

That GT450 manifold is awesome. If I was to change the blower... that is absolutely what I would do... install the DOB GT450 and buy a “supercharger only” kit... biggest displacement I can find... so I could keep the rest of my setup.

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bmeaggie said:

Just curious... I’ve never used “race gas” ... did you have your car tuned for that race gas and it still detonated and threw a rod?

e85 is about 108 octane... e90 about 114, but I don’t want to get away from the most important difference between e85 and gasoline. Y’all may already know this, but ethanol burns cooler and more efficiently than gasoline. This is not just about octane... but the thermodynamic properties of the two different fuels. Tuners can safely run more timing and produce more horsepower with ethanol... I would never be able to run at my power level without it.

All that said... if I took my car to Texas Motorplex every weekend and launched with drag radials on prepped surface... I might punch a hole in my block too... no racing for me until engine and trans are built later this year.

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bmeaggie said:

Dang it must have been pretty bad to change back. I’d trade some low end torque for top end power in a heartbeat... my low end power is way more than what’s usable with my Pilot Super Sports. I can’t even punch it in 3rd on the hwy without spinning all over the road. That’s why I probably won’t ever go to a bigger blower and instead probably send Livernois a set of heads to port.

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Sactown said:

At 490rwhp 9-10psi the car was fine, pushed the boost up over 12-14psi windowed the block it at the track on 100octane race gas, it happens even with a great tune, no issue now with the built motor pushing 24psi.

Click to expand...

bmeaggie said:

Just curious... I’ve never used “race gas” ... did you have your car tuned for that race gas and it still detonated and threw a rod?

e85 is about 108 octane... e90 about 114, but I don’t want to get away from the most important difference between e85 and gasoline. Y’all may already know this, but ethanol burns cooler and more efficiently than gasoline. This is not just about octane... but the thermodynamic properties of the two different fuels. Tuners can safely run more timing and produce more horsepower with ethanol... I would never be able to run at my power level without it.

All that said... if I took my car to Texas Motorplex every weekend and launched with drag radials on prepped surface... I might punch a hole in my block too... no racing for me until engine and trans are built later this year.

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Sactown said:

the fuel was VP 100 octane race gas (assuming it is called race gas because it is 100 octane) we can get at the pump at a station near my house, car was tuned slightly more aggressively than the 91 octane tune, I sure the fuel was the issue, we had gotten bad gas from the pump once before a while back.

Now I only run Ignite Red, it is expensive, but cheaper than a new motor lol. Like you stated in regards to the fuel, definitely allows you to "turn it up".

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• No name Long Tube Headers
• Muffler Delete
• 47lb Ford Performance Injectors
• Brisk Spark Plugs
• 3.73 Gears
• Misc. Cooling Mods
• BMR Motor Mounts