big inches or small inches for a turbo setup?
09-09-2005, 10:44 PM
#24
What would the turbo pic?
On a 408 it has to work its *** of to pump 15psi into the big motor, and spinning the hell out of itself it will be very hot and on a long run like on a road course it may overheat.
On a 347 it might pump out 20psi all day without even trying hard, it's temp levels will be more manageable and you can run hard all day.
On a 408 it has to work its *** of to pump 15psi into the big motor, and spinning the hell out of itself it will be very hot and on a long run like on a road course it may overheat.
On a 347 it might pump out 20psi all day without even trying hard, it's temp levels will be more manageable and you can run hard all day.
09-10-2005, 02:17 PM
#28
Originally Posted by sycotic_reject
that makes scense, so a street car would benifit more from the 347 than it would from a 408, ...street setup.
Could save a few bucks on the 347.
If I had the cash It would prob. be a 427TT.
427's my fav. No.
09-10-2005, 02:42 PM
#29
lol yeah i dont think a TT set up would be for me right now, and a 427 sounds like it would be more expensive, that and not very dueable for me right now. I was looking for more of the 346 route since i have one already and would be just needing forged internals to make the power i want. I could save some more extra to have a 408 but my intentions are to run a 9 on street trim, even if its a 9.99 but having to be reliable.
09-10-2005, 11:06 PM
#32
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Someone can correct me if i am wrong but my understanding is a bigger motor will just make more power on pump gas...you can build a 346 to put out 1000 but you better be doing it with some race fuel...i mean look at those mustang engines there what 289? putting down over 1000rwhp, just have to get the right setup
09-11-2005, 01:43 PM
#33
Originally Posted by BlackCamaroSS02
Someone can correct me if i am wrong but my understanding is a bigger motor will just make more power on pump gas...you can build a 346 to put out 1000 but you better be doing it with some race fuel...i mean look at those mustang engines there what 289? putting down over 1000rwhp, just have to get the right setup
Dats tru dats tru
09-11-2005, 02:08 PM
#34
well i'm tryin to make a street/strip car, were it will see some strip time, but mainly be driving on the street. So I dont really want to have a monster motor that runs on alchy only and isnt able to run down the street. Sure i'll want to run the full boost when i'm on the strip with the air/water injection kit, but have it turned down for the street to be able to run off of 93 octain. but i was still wondering which size block would make taht goal more possible. so many options to choose from! 
Thanks to everyone so far thats helped 
Thanks to everyone so far thats helped
09-11-2005, 02:14 PM
#35
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The bigger motor will not nessicarily make more power on pump gas.
Higher reving engines can also make huge power on pump gas.
Using the above example. 408ci 6500 rpm at 15psi vs 346ci 8000rpm at 15psi. The smaller engine is actually more powerful, and less likely to detonate.
Higher reving engines can also make huge power on pump gas.
Using the above example. 408ci 6500 rpm at 15psi vs 346ci 8000rpm at 15psi. The smaller engine is actually more powerful, and less likely to detonate.
09-12-2005, 10:18 AM
#37
Im pretty much in the same position sycotic_reject is in. I want to make as much streetalbe power as possible while keeping the cost reasonable.
So far, my plans are for a stroked LS2 to give me 403 cu.in. with a solid roller cam that will give me around 75% VE at 7500rpms (assuming my heads and exhaust flow well and i get the engine all the fuel it needs). Then for the induction i plan on using twin GT35r's, with a FMIC. Im hoping i can get over the 1000rwhp mark @ 20psi and still be fairly streetable when i turn the boost down and pump in 93 octane.
So far, my plans are for a stroked LS2 to give me 403 cu.in. with a solid roller cam that will give me around 75% VE at 7500rpms (assuming my heads and exhaust flow well and i get the engine all the fuel it needs). Then for the induction i plan on using twin GT35r's, with a FMIC. Im hoping i can get over the 1000rwhp mark @ 20psi and still be fairly streetable when i turn the boost down and pump in 93 octane.
Last edited by GreaseMonkey83; 09-16-2005 at 07:30 PM.
09-16-2005, 07:59 PM
#40
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Originally Posted by smokinHawk
smaller motors can make more HP with the SAME turbocharger due to the fact that the smaller motor can have a higher pressure ratio, thing is though you have to rev it up a bit more to get the needed exhaust gas velocity.
bigger motor can make more power on pump gas
bigger motor makes more power down low if you dont want to rev it super high.
bigger motors will have a flatter torque curve.
its all on the parts you use together with your motor and how you want it to drive, then match the turbo system with the engine.
bigger motor can make more power on pump gas
bigger motor makes more power down low if you dont want to rev it super high.
bigger motors will have a flatter torque curve.
its all on the parts you use together with your motor and how you want it to drive, then match the turbo system with the engine.