.

 

i have the edelbrock one its not bad

 

this is probably better served on the tbi board.

 

I like my Performer TBi intake because it was a direct bolt on and flows really well. the flow is limited however because of the stock bore size but I am planning on boreing it to 2". That should really get the most out of the manifold. It has a lot of potential but its stock bore size is a hinderence.

 

If your car is stock I would wait on an intake swap and do some other mods first. Go for headers and full exhaust first. Then, go for a cam swap and intake swap at the same time. That's the route I would go.

 

i would agree with abouve however iots your car and i love changin stuff so heres some good advise

you want decent flow with decent price go carb and adapter plate.. now heres the situation.. you want non egr you need to burn it out of chip

if you have an 87 and up then your opyions are limited cause they seem to make only the good manifolds for 86 and lower year cars...
basically if you have center bolt valve covers i would go for the edlebrock performer i think part number 2104 cause the power band is great for our cars.. idle too 5500.. and it comes egr or not

beliow 87 i would go for4 performer rpm cause its got a bigger flow rate i think and power band is somewhere between 1500 and 6000rpms

i say this cause i cant decide what to get cause my car has centerbolt but i just got new heads and i dont know the year also i'm swapping my cam for lt1 so i got the full conversion, lt1cam lg4 heads and my new manifold but i hope you have goood luck with your swap

 

.

 

its not bad at all probably better but it depends on how bad emmisions are in your state.. but i hate my egr and cant wait to get rid of it

 

IMNSHO

you are better off with a single plane on TBI cars. i would sugest the weiand 7525, it has EGR if you want it, they make the same manifold without EGR also. you will not suffer the low RPM drivability issues you get with carbs but you get all the benifits of the single plane. even though it is for pre87 heads, a couple of minutes with a drill on the center two holes, and it will fit like a glove

 

single plane???
on a stock TBI?? i thought you needed monsters injectors and serious flow for a single plane... those are for track i thought? maybe i'm wrong but if i am my holley street dominator has been collectig dust for no reason

 

no, your fuel requirements will be determined by your horse power level, changing any intake, without heads or cam on these cars, will be only a small increase. flow will be limited by the TBI but with the large plenum size of the single planes (which is a big deal on injected cars) you will see a gain. i don't know if your street dominator will fit under your hood, once you add anotherh 1" for the adaptor, but you don't need to fear the single plane with TBI, we don't need the same vacume pulsing at low RPMs that a carb needs, and so we don't have the low end fueling issues, or the drivability issues that you would ahve with a carb.

like anything else, there is such a think as too much, the 7525 fits the bill well because it is a relativly small single plane, and it is one of the very very very few single planes that has EGR. so some of us who have to get past the smog ****'s need that.

 

'll be damn you learn something everyday.. i got a cowl so if i were so inclinded to put the dominator on i guess i could especially sinc ei'm going full trottle with head cam and intake swap but maybe i can reconsider my choices for an intake now

 

the dominator may not be the best choice. i assume you have a strip dominator? if so the ports on that are HUGE, it is quite a mismatch with the port size on the heads, that will cause alot of turbulance.

 

i will be swapping to a dual 670 holley TB this spring. i already have the weiand single plane. any recommendations on the adapter plate? i see howell enginerring makes one? i assume holley does as well.

 

anyone know any good/bad aspects about the weiand x-celerator single plane manifold? 7547 is the # i believe

-chuck

 

but, don't the bolts then come in at a different angle? how do the bolt heads contact the intake surface?

 

if it is an issue, and the manifold isn't sealing, there are a couple of companies that sell wedge shaped shims for this, the are made at the right angle so the bolt will have full contact.

 

Dewey,

Do you have the part number for the non egr one. I found the 7525 on jegs and summit but both are listed as "special order items"

 

shifty,

7530 is pretty darn close. it is still a fairly low RPM rated single plane, but without the EGR, the design is pretty close to that of the 7525.

http://www.holley.com/HiOctn/ProdLin...MSM/f7530.html

not sure why summit and jegs are listing it as special order, i bought mine early on this summer from summit, they actualy had it in stock at that time.


**edit**

ok, i just did a little more research on holley's site.

the X-CELerator signle planes seem to be similar in port size, i really can't find much info on plenum volume.

i think that either 7546, or 7547, would probably be descent choices, they have rather small intake ports, so it should work well without modifing the heads, probably better than the larger ports of the 7530. just as a side point here, the 7525 ports are almost exactly a Fel-Pro 1204 gasket, the 7530 is slightly larger (probably closer to a 1205) and the 7546, 7547, are slightly smaller. that might factor into the descision for which manifold to go for.

 

i have the 7547. i am not aware of disadvantages BUT it was said that a dual plane offers more TQ than a single plane so the dual plane is preferred over single. i have never run a dual plane on this car. a crossfire swap. it fit under hood(vette). i am not sure that dual is the preferred? there must be some connection between the TBI and the single plane as far as functionality. i have no idea what that is. i have 268 TQ and 222 HP at wheels.

 

do you know where i can get those shims?

thanks

 

i am pretty sure summit sells them. if i get a chance later today, i can call and ask them for a part number. if anyone else is just sitting at home, a quick call to summit would get us a part number. being that i am at work, i won't have a chance to call for several hours.

 

Oh that is okay. No need to call. I was just curious and thought you maybe had it off the top of your head. I am considering getting rid of my edelbrock TBI intake one day, especially if I mess up the bore enlargment on it.

 

Ronny: most people have dual because its stock and in a more traditional since generally w/ a carb you'd lose power lower in the rpm band with a single plane. Since TBI doesnt work off of vaccum (the I part of TBI) this isnt an issue and most people dont pick up on the advantages to going single plane.

The 7547 is $107 right? this is the most appealing aspect i can see in it when comparing it to other single planes. It's going to be much better than stock and shouldn't be maxing out since it will be a long time before i can afford to port my heads or pull a cam swap (correct?). Anyone know if it has EGR?

 

the only one of the parts listed that has EGR is the 7525.

yes, you are correct, the TBI does not use the vacume signal the same way a carb does, and because of this doesn't have the drivability issues, or the fueling issues that a carb would.

also, by opening up the plenum you give yourself that much more air for the engine to have access to at any given time, this way both banks work off the same plenum and both TB bores, not seperating them. i have heard that it is like give the engien 1/3 more airflow when you compare the way that a single plane uses the air vs a dual plane (i think that is what i heard, don't take it as pure truth)