Power AdderGetting a Supercharger or Turbocharger? Thinking about using Nitrous? All forced induction and N2O topics discussed here.
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Alright thanks, im not going to do put nitrous in my car im all set with that.... I was considering super/turbocharging it but dont have that kind of money right now plus i'd rather do that to a 350 then a 305...
I'd say my 305 TPI w/ turbo would pretty much stomp on any 350 fbody in my area right now....the 305 tpi packs a mean punch with a turbo....
__________________ Old combo: turbo 305 TPI 700r4 3.45 9 bolt
7psi....13.6 @ 105
New combo:383 nitrous motor TH400 9 bolt w/ 4.11's
All motor 11.41 @ 118 best mph on motor 11.43@121mph
Best run in 2008 10.78 @ 127.88 100 shot of juice
Best so far in 2009 10.622 @ 127.78 100 shot with a 6point rollbar.
Alright thanks, im not going to do put nitrous in my car im all set with that.... I was considering super/turbocharging it but dont have that kind of money right now plus i'd rather do that to a 350 then a 305...
Keep in mind you can build yourself a turbo setup that will transfer over to the 350 block when you get around to it. TURBO would be my vote for that lil 305.
__________________ PROJECT UGLY DUCKLING
1989 10:1 353 L98Edlebrock base and runners ( really ported)ZZ4cam ,1 3/4 SLP shorties 083 heads ...cleaned up andstuded w/1.52 rr , LT4 valve springs and retainers and a 3 angle valve job
suspension mods (Hotchkis LCA's PH bar, KYB shocks and struts)
T-5 3.73
T-62 turbo to be installed next ...Exhaust clip ...gota let it load.... http://media.putfile.com/My-exhaust-clip
Keep in mind you can build yourself a turbo setup that will transfer over to the 350 block when you get around to it. TURBO would be my vote for that lil 305.
or be like me and transfer it over to a stroked 350 for a lil more umph...383+turbo mmmm. That is what im doing....but I started with the turbo kit so I could still enjoy the extra power while I build my pricey 383...believe me I'm so happy with the turbo 305tpi It really liven the car up....A LOT!!!!b Just wait till the 383 is finished.....mmmm cubes and boost mmm
best bet is a supercharger no lag and no need for intercooler. if u go turbo u have to mod ur headers low comp cam and also turbos need oil becuase they go about 15k and they mess with ur exuast pressure. its just a bitch if u got time to tune and mod go a head. i dont know much about tpi upgrades i like to also know beside heades headers cam. and a stealth tpi. is there pulley kits???
what was all involved with your setup, and what kind of hp numbers you running now, ol'blue?
can i run my 730 ecm with some prom tuning?
I purchased the BBS race header and fabed everything else up myself....I haven't dyno'd the car yet...But the 305 tpi with 2.73 rear gears wouldn't burn the tires at 35mph like it does now lol I had a chip burned for my ECM by this guy TPI CHIPS seems to work well for me.....as for lag...only to 2200rpm's...then it unleashes its fury.
Alright, I think that for now I'm going to do what Ol'Blue suggested.... I'm gunna look for a turbo or super charger untill i swap ina 350 or 383, what would you guys reccomend,turbo or supercharger? and do any of you have any good websites that supply them?
__________________ Old combo: turbo 305 TPI 700r4 3.45 9 bolt
7psi....13.6 @ 105
New combo:383 nitrous motor TH400 9 bolt w/ 4.11's
All motor 11.41 @ 118 best mph on motor 11.43@121mph
Best run in 2008 10.78 @ 127.88 100 shot of juice
Best so far in 2009 10.622 @ 127.78 100 shot with a 6point rollbar.
best bet is a supercharger no lag and no need for intercooler. if u go turbo u have to mod ur headers low comp cam and also turbos need oil becuase they go about 15k and they mess with ur exuast pressure. its just a bitch if u got time to tune and mod go a head. i dont know much about tpi upgrades i like to also know beside heades headers cam. and a stealth tpi. is there pulley kits???
The same things can apply to both turbo and supercharger intercooler, cam, compression and tuning but you mention it as only a downfall to the turbo? It just depends on what your goal is.
I'd say my 305 TPI w/ turbo would pretty much stomp on any 350 fbody in my area right now....the 305 tpi packs a mean punch with a turbo....
I got a 350 f-body.
__________________ Boosted and intercooled L98 with 749 ecm
10.78@128-1.5 60ft(new best time july/06)-570rwhp@13lbs on pump gas. Est. 600+rwhp@16lbs on 100 octane. Capable of 18lbs, but havent done it, ok maybe once.
Featured in GMHTP mag July 07
__________________ Boosted and intercooled L98 with 749 ecm
10.78@128-1.5 60ft(new best time july/06)-570rwhp@13lbs on pump gas. Est. 600+rwhp@16lbs on 100 octane. Capable of 18lbs, but havent done it, ok maybe once.
Featured in GMHTP mag July 07
Quote:
Originally Posted by irocznickv8
best bet is a supercharger no lag and no need for intercooler. if u go turbo u have to mod ur headers low comp cam and also turbos need oil becuase they go about 15k and they mess with ur exuast pressure. its just a bitch if u got time to tune and mod go a head. i dont know much about tpi upgrades i like to also know beside heades headers cam. and a stealth tpi. is there pulley kits???
Quote:
I never seen so much wrong info in one post.
Indeed. First off turbo lag is something that is practically gone from a well built project. I've heard of board members being at full boost by 3400 rpm's!! Boost is boost and intercoolers are a must for any boosted application over 8 lbs. regardless of blower or turbo. Turbos and most superchargers both require oil so that should have no merit in your decision. Yes you'll have to modify your headers for a turbo but its well worth it to feel the power!!
Indeed. First off turbo lag is something that is practically gone from a well built project. I've heard of board members being at full boost by 3400 rpm's!! Boost is boost and intercoolers are a must for any boosted application over 8 lbs. regardless of blower or turbo. Turbos and most superchargers both require oil so that should have no merit in your decision. Yes you'll have to modify your headers for a turbo but its well worth it to feel the power!!
If your going to correct misinformation, at least correct it properly.
"Turbo lag", or IMHO "engine lag" is always there in a properly built setup, even practically. It still affects the characteristics of the engine and the way it operates at certain points. You may not care about it, but it's there. The turbos take a certain amount of time to spool up and make boost once the throttle is open. Compare that to a roots or twin screw style blower that hits full boost with the opening of the throttle. Turbos don't do it, even turbos that are way too small.
I've heard of plenty of turbo setups on here that hit full boost much faster than 3400rpm, even my 2.0 hits a full 24 psi at 3500! That depends on what full boost is, and of course turbo size and everything else.
Nothing in general terms is cut and dry. You can't say IC's are a must over 8 psi. Boost is boost (not even taking into consideration the relationship between psig and psia, which changes with altitude and other conditions), but mass air flow and temperature aren't linear constants with boost. Do intercoolers help make more power more reliably? If properly sized, most of the time. Are they a must? It all depends on the setup. What people need to know is what they do, why they do it, and the other parts of the system that they affect and how.
Turbos and superchargers do both require oil, but often superchargers have their own oiling systems whereas turbo systems usually don't, so that can be factored into a decision, abeit it's a minor issue and you could go either way in both cases.
As for the original misinformation, people covered most of it.
Turbos usually spin much faster than 15k RPM. It's often more like 60k-150k at full tilt. Centrifugal superchargers also spin much, much faster than 15k.
Centrifugal superchargers don't make instant full boost, they're geared at a certain ratio with engine RPM, so they often don't hit full boost until close to redline, which makes then slower than many turbo's.
There's no such thing as Stealth TPI. Maybe you meant Holley Stealth Ram.
...and learn how to type so people can read what you write.
I know most of this is common knowledge that has been beaten to death, but I hate the idea of a random newbie coming on here and reading and believing this kind of stuff like it's fact then spreading more misinformation.
__________________ 90 Camaro IROC-Z TT: Maybe it'll run right someday. "TWNTRBO" 96 Talon TSi AWD: 11.9 @ 117 & 31mpg- daily driver. "ALLTRBO" 87 Fiero GT: Old, stock, and slow- backup beater. "NOTRBO"
Last edited by Steven89Iroc; 06-10-2006 at 12:27 PM.
If your going to correct misinformation, at least correct it properly.
"Turbo lag", or IMHO "engine lag" is always there in a properly built setup, even practically. It still affects the characteristics of the engine and the way it operates at certain points. You may not care about it, but it's there. The turbos take a certain amount of time to spool up and make boost once the throttle is open. Compare that to a roots or twin screw style blower that hits full boost with the opening of the throttle. Turbos don't do it, even turbos that are way too small.
Yes there is some lag. Yes im aware that roots and twins hit full boost when you hammer it. I did say practically gone didn't I? My point is that the effects of lag on a good setup are so minimal that its not worth counting out a turbo system.
Quote:
I've heard of plenty of turbo setups on here that hit full boost much faster than 3400rpm, even my 2.0 hits a full 24 psi at 3500! That depends on what full boost is, and of course turbo size and everything else.
Nothing in general terms is cut and dry. You can't say IC's are a must over 8 psi. Boost is boost (not even taking into consideration the relationship between psig and psia, which changes with altitude and other conditions), but mass air flow and temperature aren't linear constants with boost. Do intercoolers help make more power more reliably? If properly sized, most of the time. Are they a must? It all depends on the setup. What people need to know is what they do, why they do it, and the other parts of the system that they affect and how.
I was speaking very generally in terms of thirdgens. I dont know many long term setups that have shown great success over 8psi without intercooling or meth (3rd gens). Read the post I corrected. The guy says that you dont need an intercooler for a supercharger but you do for a turbo. Thats why I said boost is boost. The guy didnt mention psig or psia so I assumed he meant 8lbs on a turbo needs an IC and 8lbs on a charger does not.
"TWNTRBO"
I did say practically gone didn't I? My point is that the effects of lag on a good setup are so minimal that its not worth counting out a turbo system. 
