My friend has a 305 5 speed bird. We have allready done aluminum flywheel, cold air intake, underdrive pulleys, and a chip and a stat. Its still not that fast but we really want to get a good intake on it, and a nice exaust. Keep in mind we have to pass smog in california. If anyone has any exaust systems that are legal for this application or intakes please let me know. We know about the edelbrock, but i was wondering if there was anything else.

 

Hooker (owned by Holley) also has an emissions-legal header & y-pipe setup for relatively little money. Has required O2 sensor and AIR tube fittings. A good flowing exhaust system is one of the biggest favors you can do for a TPI engine.

Intakes that are legal would be limited in most cases to aftermarket intake runners and/or lower intake manifold working with the stock upper plenum. Edlebrock, again has parts available that are emissions-legal. Not sure if any other manufacturers have emissions legal intake systems for the TPI. Here's the link:

http://www.edelbrock.com/automotive_...l-inject.shtml

Also, there's some power to be gained by porting the upper plenum of your TPI intake. Do a search and you'll find information about it (espeically over on Thirdgen.org). Don't worry- it's easy porting, not like porting cylinder heads. Even a first-timer can do it.

 

thanks for the info man, i have also found a accel super ram. This is also emmison legal, what do u think of this intake aswell.

 

what do we think of a super-ram? Well I personally think you're an idiot if you can afford it but DONT buy it

 

The stock intake will flow enough air for anything you can throw at a 305. The problem comes when you either put it on a bigger ci motor or try to pull past 4500 RPM.

 

Turning past 4500 rpm is necessary in a 305 or a 350 for really building good power. When I had my 305 auto it was a turd above 4500 rpm, and it was seriously like someone just switched off a light. GREAT pull from 2000 to 4200rpm and steady from 4200 to about 4500 and then it began a steep decline. Luckily the 5 speed cars are a little better with a different cam than the auto's but still revving beyond 4500 is almost a necessity if you're going to have a fast car both from a stop and on the top end of things.

 

When I was going to do my IROC buildup that was my plan, buy a super ram. However, now that I'm trying to beef back up on my thirdgen knowledge there's a lot of folks doing LT1 intake swaps. Dunno what kinda good that would do or how expensive it is, but the results seem to be much better power at 5000+ than stock, but I haven't seen a flow comparison between the LT1 and super ram intakes.

 

, only problem is, a LT1 intake on a gen 1 motor can't run EGR

 

I'm not sure which is better (Super Ram vs. LT1-style intake) But the Holley Stealth Ram is supposed to have the same rpm-band as an LS1. I think the Super Ram may be the same but I'm not sure

 

Holley Stealth Ram or a converted LT-1 intake are not emissions legal (on EGR provisions). Ask around on Thirdgen.org about the SuperRam- they work well but are a PITA to install and have some quality issues.

Regarding an automatic-trans 305 TPI not having anything over 4500 RPMs...... they were given much smaller cams than their 5-speed brothers. Affectionately known as the "penut" cam. That's a big part of why 305 TPI automatic cars had no power in the upper RPM range.

 

^So why did the 305tpi engines stink in the upper ranges then?

 

The auto's suck especially bad because of a weaker cam. All tpi engines in stock trim ran out of breath early though.

 

K heres a thought, hypdertech chip, 160 stat, edelbrock tuned port runners and base plate, slp 1 3/4 inch exaust full with flowmaster 40 series. What kind of power do you think the 305 will make (shifting at 5600 rps or so) with this setup. Probably going to put some good heads on there, want to rais the compression and give the cam some lope to ;] but just with that full exaust and intake, what kind of power can we expect?

 

Hypertech is junk....160 stat is good, but you need to make sure it will not cause the emission stuff on the car to freak out. Edelbrock tune port runners have some quality issued I'd probably either port/polish the stockers or go SLP. 1 3/4 inch headers are a bit big for a 305 but you could run them. Flowmaster also junk. Shifting at 5600 rpm in every gear will HURT your times on a TPI car. First gear to redline or 5500 rpm is ok, the next shift from 2 to 3 depending on hte car builds power you'll probably wanna shift about 5200 or so rpm. On the 3-4 probably 5000 rpm.

Be careful about heads/cam on a TPI car. You could wind up really dropping some money to only see small gains. If you're keeping the factory intake setup (I dont care what brand, if you're running the long tube runners like the stockers) you need to really do your homework and match your parts.

 

K so give me a full intake, exaust, and heads for this car that u think would benifit shifting at 5500 rpm. I know he can shift at 5500 rpm, the super ram will go to at leaste that i know for sure, suposodly the edelbrock one aswell. Let me know, thanks.