First I was wondering what is the difference in applications for 190's and 195's. I will be driving the car daily, but the cam I plan on will have a pretty good top end and I will have an aftermarket stall. For now I have a ported stock alum intake, but would liek to go with a single plane in the future. I also wondered about what are the heat risers? Do I need them. I am building a 350 w/ a computer controlled carb. Should I keep egr? What are the benifits or downfalls of egr. I have heard that egr will keep your combustion temps down so you dont get knock while cruising, but does this affect the car under acceleration? Thanks for the help.

Ben

 

they are for OEM sized ports.

195s are for felpro 1205 intake gaskets and are for performer rpm and vic jr intakes. Exhaust crossover /heat riser preheats the intake charge for faster warmup.

You will not likely be able to use a single plane (no crossover) with computer controll carb. Same for no-egr.. it will probably light the check engine light.

 

Ok, I will get the egr then. About the heat riser/exhaust crossover though is it something I should get or shouldnt? Also could you explain why I wouldnt be able to use a single plane intake? Also, I was just thinking, if the egr would cause an engine light wouldnt that mean that everyone runing around with a miniram in place of their tpi would have the engine light glaring in their face? Thanks for the help, and I am not trying to argue, I just want to get things straight if I am going to spend that much money on something.

Ben

 

Since it is vacuum driven, it can be removed.. and will probably not throw a code..
The problem will proably be having high cylinder pressure (NOX) and preignition if no EGR is operational.


Look at this intake

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1840652174

On a dual plane, the crossover goes under the carb.. there is no provision on a single plane for this function.

 

By crossover are you referring to the exhaust crosover? Sorry I am kind of lost. If you are referring to the exhaust crossover it just warms up the motor faster right? If you are referring to something else, what does it do and what problems would it cause to not have it.

Ben

 

just different terms.. your going to have some cold start/driveability issues without it..

 

Ok, well then do you have an intake that you would suggest that would have good mid/high end that has these features? Thanks again for the help.

Ben

 

AFAIK on a CC carb setup, the computer cannot tell whether the EGR is working or not. No codes will occur from not having it. You are correct, it is not operated at WOT, but does allow for higher cruising timing, and therefore sometimes better gas mileage. But if your CR will be below about 10.5 with those heads and any cam that makes sense to go with them, it's probably not an issue. I would pick the combustion chamber CCs and pistons to put the CR somewhere as close to that as conveniently possible.

Suitable intakes might include the Performer RPM Q-Jet, and several parts from Holley's Stealth product line including a very low-rise single-plane, and some larger dual-planes. A good cam would be something like the Comp XE268H with 1.6 roller rockers.

Single-plane intakes are going to have real low-RPM driveability problems with any Q-Jet, but especially a CC one, due to the much reduced venturi velocity resulting from the 2 primaries sharing each cylinder's flow pulse.

 

Actually I have that cam in my room. I was considering going with the next step up but was having a hard time deciding. I have not heard great things about edlbrocks more recent intakes, so I might see about one of the Stealth intakes. Do you think I should just go with a large dual plane in that case? Do the stealth intakes have egr or not? Around 10.5 cr you say?

Ben

 

I've just built up a 355 with AFR 190 heads. I'm using the Edelbrock performer RPM intake non-egr and have not had any engine codes. I'm also still using the cc carb and distributor.

Hope this helps,
Craig

 

What kind of compression are you running? Also, you have had no pinging right?

Ben

 

I am running 10.2:1 compression and I used the knock sensor too in this block. I have yet to hear any pinging and don't expect too. I'm also using a comp cams magnum 270 cam.

have fun,
Craig

 

Thats cool, just what I wanted to hear.

Ben

 

Would the stealth intake have the exhaust crosovers?

Ben

 

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