Hey guys,

Alright, I'm going to do a bunch of changes to the car and am hoping to order the parts tonight. I'm getting a set of Trick Flow heads, 1.6 roller rockers (What pushrods should I get?), and was looking at an aftermarket intake manifold (Either the weiand stealth or the Edelbrock Performer RPM). I was all set to order this stuff and then I made the mistake of calling up Summit's tech line.

Question 1: The guy at summit said that if I run a carb manifold w/ a TBI adaptor plate that the engine would ping at middle throttle or that the O2 sensor would pull it back and it would run sluggish. Is this true? He said I should get the Edelbrock TBI manifold, but I heard they were junk.

Quesiton 2: He also said that if I switch to a manifold without an EGR provision that my car will run like crap. (I've already changed the chip so that the EGR is disabled and it runs fine now.) Is this true?

Question 3: Should I just turn to a carb?

HELP!
Mike

 

Don't listen to anything he just said. You car will run fine with the carb manifold and adapter. He's prbably trying to get you to spend more $ because the tbi manifold costs more. If you already have no egr and car runs fine then you already know that the second thing he said was bs too. Once again, probably trying to get you to spend more.

 

yeah i've never heard that on this board... the best fit for our cars is carb manifold and tbi adaoter...
the only thing that I could see what he ment was since we have egr, you cant just take that out so maybe if you dont burn the egr out of the ecm you could have problems... but othere than that go for carb intake!!

 

question 1: he's full of ****. and the tbi intake is not junk.

question 2: he's full of ****.

question 3: no

 

The problem with 90% of the tech help out there is that they know little about fuel injection, and what they do know is strictly from the description of the products. I have actually gotten pretty good at troubleshooting though thanks to lack of knowledge on their part. So anyways, to answer your questions:

1: The only reason you would have any problem with the stealth or performer rpm is if you leave the stock cam in there. Even w/ 1.6 rockers, the cam's lift will be too small for those intakes. But given you have cam with descent specs, along with those trick flow heads, those intakes would work great. I would recommend to stay away from the performer tbi intake, the plenum and runners are still reletively small, as is the tbi bore. Going with a carb intake is beneficial because, 1) they are cheaper, and 2) if you ever go with a larger tbi or carb, it is much easier to simply swap adapter plates rather than swapping out intakes or even just pulling it so you can bore it out.

2:As long as the egr is disabled in the chip, you will be fine.

3:Only if you want less reliability and milage.

 

Awesome, Thanks a lot guys, I really appreciate it.

I thought it seemed kind of shady (I couldn't quite figure out how a TBI knows if its bolted onto a carb manifold or not). It also seemed weird about the EGR valve because people are removing them left and right. He also said that I can be fined like $12,000 grand for removing it. I'm a law student and when I checked for a law like that (he said federal) I couldn't find one (there is one pending in CA). If it were so then all states would require vehicles to run emissions equipment, if our cars are exempt, then all cars of that model year would be exempt.

huh, should've thought about all of this before I bothered everyone.

Thanks again,
Mike

 

This is a little off topic etc....but I am doing a carb manifold swap myself and was thinking about dissabling the EGR myself. What is involved in doing this??? And what are the bennefits/drawbacks to doing this other than the fact that I dont have to worry about purchasing a new EGR valve to fit the new manifold?

 

benifits will be in theory more power, the exaust gasses displace volume in the intake charge, so that means less air/fuel per cycle, so when you get rid of EGR, you should have more air/fuel which = more power.

drawbacks - without a custom chip, you will get the SES light. and also you children will grow up in an world that looks much like the movie 'the road warior' because of your disregard for the environment (just kidding)

 

OK guys, I finally ordered my parts, but I have one quick question.

Because this is a carburetor intake manifold it doesn't have the fuel return line or whatever that line is that leads from the front of the intake manifold into the evaporation canistor (I think it runs there, I didn't bring anything in with me). Anyways, the fitting goes from the front drivers side of the manifold almost immediately below the TBI unit and then to the evaporation canister (again, I'm not too sure if thats where they are going). Should I just tap and drill all that stuff out or can that stuff be omitted?

Is that something that is involved when the EGR valve operates and could definatly be eliminated since I'm not going to run my EGR?

Thanks,
Mike

 

As far as egr goes, you just need to cap off the vacuum line from the source, though I don't think you can remove the source because of the heater control valve......which leads to the next thing. I think you are talking about the hoses going to the heater valve-it's definetely not a fuel return line. Anyways, there should be a source somewhere on the manifold, it may be in a different place and maybe even a different size, but it should be there. Just reroute your hose.

 

he's talking about the purge line.... just remove it, but i would either:remove it all and cap the metal line under the hood and by the tank, or you could keep the canister and remove just the plastic line going to the tbi, up to you