Building a Stroker. Want pros and cons of turbos/superchargers
I am planning out a stroker conversion. I want to add later either a turbo or supercharger. I know, I'll probably have to change a few things to make it work well later. Anyway, can you please tell me the pros and cons of each system as well as what I should be aware of when building the motor.
Thanks
Re: Building a Stroker. Want pros and cons of turbos/superchargers (92TripleBlack)
You should do the SC first, than when your ready to do the stroker there would no waste.
As far as turbo charging, considering that there is no kit currently on the market and probably never will be the cost of a custom kits will be quite large.
Re: Building a Stroker. Want pros and cons of turbos/superchargers (Hammer)
Pros Stroker for forced induction = power.
Cons= need a lot of cash. My combo run me almost $14.5k. everything has to work together as a complete setup for it.
Bruce
93LT1 Conv w/ZF6
Blown D1-SC/N2O
Agostino built 383ci
Re: Building a Stroker. Want pros and cons of turbos/superchargers (92TripleBlack)
A company on the West Coast in the LA area run by a fellow named "Banks" I forgot his first name, was quite famous for turbocharging. You find him and get ready to go fast. A plus is that he can put it all under the hood. If one is not enough he can supply twins which would be awsome. A National Dragster by NHRA may have his add. I dont think you would be dissapointed. But maybe your friends will. :lol:
Re: Building a Stroker. Want pros and cons of turbos/superchargers (wallyknoch)
Thanks for the compliments and congratulations, it really has been a challenging, drawn out project. There were certainly times when I thought it was a waste of time and effort, but now I'm pretty excited.
The neat thing about it is that it really is "mild", the fuel ratio is on the safe side and the timing is conservative. Jeff and Mark at Fast Times said it's got 1400hp in it, but I'm skeptical about that, becuase Precision only rates each of the PT-52's for 600 hp. We still haven't even touched the boost controller. It's on the minimum setting, relying in the spring in the wastegates only. Curiously, the wastegates only have 10 pound springs, and we amxed out a 2 Bar MAP sensor, 15 psi. It's probably making about 17-18 lbs, we guess, with no signs of detonation. Jeff thought the plugs looked awesome, reinforcing his opinion that there's alot more left in the engine, and that it's a very conservative, safe tune.
We only ran it on the dyno 3 more times. I got there at 3:30 and we weren't able to start dynoing it until after 5:00 because Jeff was so busy. I felt guilty keeping him longer because he was at the shop until 10:00pm last night and he had alot of work left to do today before he left.
We only spun it up to 6600 rpm on the last run, and it made 1151hp at 6600rpm, and still climbing more than 10hp/100rpm, and peak torque was 970 at 6000rpm. It's probably a 1200hp motor at 7000 rpm with the current tune, and we weren't even pushing it hard. It only has 23.5 degrees of timing and it's still on the rich, safe side. I could probably get 1300 hp if we pushed it, added some more timing and leaned it out, but since it's a street car I want it to be reliable on pump gas in any weather. Needless to say, I think turbos are friggin' COOL! My intake air temp was only 126F with nothing more than a little fan going over the intercooler.
We tried to start the dyno run at a lower rpm but the dyno wouldn't hold it, the engine makes too much torque at low rpms for the dyno's "brake" to hold it. I think that's kinda cool too!
We just dyno'd with 93 octane pump gas, I was tempted to ask Jeff to fill the tank with some race gas but it was getting late and I could tell he was tired and had more work left to do before he went home. I plan to keep it traction limited by sticking with street tires, something like Michelin Pilots. Hopefully, that will allow me to maintain the IRS, albiet upgraded with better parts.
I wish we could have gotten the dyno runs down to 3000 rpm or so, that's where Precision said it would start making significant boost, but as I mentioned the dyno wouldn't hold the torque below about 4000.
Re: Building a Stroker. Want pros and cons of turbos/superchargers (Rkreigh)
I was lucky in that there are good shops in the Chicago area that have experience fabricating turbo setups due to their involvement in NMCA/NSCA/NMRA racing. If you're in a metro area, I'm sure there are similarly experienced shops. It's really not that hard, I ended up doing half the work anyway. If you can TIG weld, it's something you can do.
The engine is making more boost than I anticipated, and I'm kinda surprised. This is my first turbo car so that's not saying much. The wast gates have 10lb springs in them, and I'm using a "dial a boost" boost controller, we never even touched it and it's set at the minimum setting. It should technically only make the 110 lbs of boost at the current setting, but it's making 15 psi+. Since we didn't think it would make or take more than 15 psi, we used a 2 BAR MAP sensor, and it maxed out at 6000rpm, so we're estimating it's making somewhere around 18psi - on pump gas with no detonation. I suspect I could probably push it to around 20 psi or so. There's still alot left in it, it's only got 23.5 degress of timing, and the air/fuel ratio is on the safe, rich side. Jeff and Mark at fast Times said a degree of timing is worth about 50hp at this level, but I just wanted to play it safe since this is a street car on pump gas.
Corvette Store
Building a Stroker. Want pros and cons of turbos/superchargers
