Four Barrel Throttle Body vs. 90mm with Elbow.

I will so be converting to a single plane throttle body once I get my new 227s. Right now I am up in the air concerning the throttle body setup.

My options I am currently considering are either the a 1350cfm Accel Billet Throttle Body or a 90mm Accufab with a PTE Elbow (90 degree or 100 degree).

Does one have much of a power advantage over the other in a NA application with a little spray? Is it substantial?

I am also concerned a bit about the throttle tip in with a large single blade 90mm throttle body, but I figure with my FAST and enough tuning that will be manageable.

I am not worried about having to run an aftermarket hood for clearance with either system, but I worried about clearance with a Four Barrel style throttle body as I have yet to see pictures of a similar setup that didn't look like it lost the windshield wipers.

I do like how the Accel throttle body has various vacuum ports built into it and that it comes with a TPS and IAC motor.

Any thoughts and input would be appreciated.

Dave

Get a 4 hole 1300CFM from Ron's Racing and it will elimanate the drivableity problems with tuning.After tune it should drive like a carb setup. Talk to Ron and tell him what you are going to do with it and he will get you fixed up. ;)

.edit.

Given a choice I'll run the 4-bbl style TB. Once you throw an elbow on there it's just one more corner the air has to get around. As for the races that Hawk mentioned above... I would not plan my combo around those types of events since their rules change as often as the wind changes direction...
Steve...

Given a choice I'll run the 4-bbl style TB. Once you throw an elbow on there it's just one more corner the air has to get around. As for the races that Hawk mentioned above... I would not plan my combo around those types of events since their rules change as often as the wind changes direction...
Steve...

Last October I was at Milan Dragway and Quinn was there also, Steve was say'n he's not sure if the 90 isn't doing "funnythings" to the air above 8000 rpm. I never asked if the floor of his efi victor is like my culter intake with a cast in rasied taper centered somewhat too the TB flange.

Thanks for the support Steve, you do know that Paul and Joe Overton have been having input on the rules right?

Anyway, we are posting up rules in a day or so.

Thanks for the support Steve, you do know that Paul and Joe Overton have been having input on the rules right?Hmm... I could have sworn the rules have constantly changed for ALL these types of events yearly... maybe it's just me...

Hawk as for the "funny things" with the airflow above 8k... don't think I'll be in that rpm range for a while, LOL. On the rased taper in the manifold are you refering to something like the "turtles" seen in some of the high end single planes... Brodix, etc...?

We've brought in all our advertisers for input and won't be changing the rules in substantial way for 3 years. But knocking us in a public forum does little to help with the cause Steve./tangent

Back on topic, I like the elbow stuff more from an aesthetics standpoint.

If you ever want to race your LT1 powered car in one of those LS1tech shootout races , don't put a 4 bbl throttle body on. They don't allow throttle bodys with a disadvantage in flow.
You need to clear this up for me.

How is a 4 hole a disadvantage?????

A nice ol big 90mm flows way more than any standard flange 4bbl throttle body ever could. ***EDIT non-tech contecnt out***
4bbls tb's cost a bit more than what a mono goes for.
I'm done.
peace

You can get 4 hole to 2500CFM+ what does a 90MM flow? An the elbow just adds plentum area.
The 4 hole also adds more drivabality over a mono blade.

2500 cfm throttle bodys are not Standard flange units,Of course a dominator sizes TB will be king over a 90.
The accel 4bbl's that the topic ask's about is a standard flange unit.

On the rased taper in the manifold are you refering to something like the "turtles" seen in some of the high end single planes... Brodix, etc...?
Yes just that.

2500 cfm throttle bodys are not Standard flange units,Of course a dominator sizes TB will be king over a 90.
The accel 4bbl's that the topic ask's about is a standard flange unit.

Who cares WHAT flange they are, more air is more air and a 90MM can't touch a 4 hole,and you have slightly less clearance problems.They also make adapters from standard to dominator flange.
I ran two 4 hole on a sheet metal with mech fuel injection and they worked fine.A lot more responsive than carbs and made more power than a tunnel ram.

The content should be limited to "technical" issues. I don't want this to turn into one of those ugly, endless threads about what the rules are, who makes them, and who they help/hurt. That is not the purpose of Advanced Tech. Take it somewhere else.

The content should be limited to "technical" issues. I don't want this to turn into one of those ugly, endless threads about what the rules are, who makes them, and who they help/hurt. That is not the purpose of Advanced Tech. Take it somewhere else.
Sorry Mr Fred, I.

Removing disallowed content now, I :)

Thanks for the input.

Cost is not too much of a factor, as they are pretty comparable in cost with several of the 4 Barrel Style Systems running approximately $550 with the TPS and IAC Motor. By the time I buy an Elbow, an IAC Adaptor, the appropriate IAC Motor, a 90mm Accufab or Wilson and a Ford TPS they are pretty much the same cost.

Per Accufab's website the 90mm flows 1369cfm @ 28".

The car is very close to being a track only car, but I just hesitate to cut the cowl up past the wiper linkage, etc to properly clear a Four Barrel Style setup. Mainly for appearances sake.

As for Four Barrel Throttle Bodies, any body have any suggestions? Accel? MSD? Holley? Accufab? Force-EFI (not sure whose brand)? I couldn't find any information about the Ron's setup, but I had limited time to search.

I am not stuck using a 4150 flange at the moment. Once I get the castings to the porter Kevin Self at Self Racing we will talk about the best manifold to convert to EFI for my application, it is likely to be a Brodix or Dart manifold all of which come with either flange.

Dave

Dave,
the link to Ron's..




http://www.ronsfuel.com/

Dave,
the link to Ron's..




http://www.ronsfuel.com/Thanks, I will check it out.

Dave

Here is a link to some pic's of my holley 112-513 its billet and 95mm. I chose this one over the accufab because it was billet. I also got it without the IAC holes as i will add that myself. This is the second manifold i have done this way. I use this method over the flat TB as it makes more sense to use one big hole with less disruption than a flat TB with 4 holes, then make a elbow on top. I fab up the elbows myself also as i can then place the throttle body where i want instead of having to go where sombody else decided to make it.

First link is the new stuff for my blown SBC:
http://bigtimeauto.com/gallery/projects
This link is for my Typhoon intake i made with a 80mm BBK TB:
http://bigtimeauto.com/gallery/Typhoon/aap