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Kirkham Motorsports

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Old 07-11-2016, 07:09 PM
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Default Do 8 Stack EFI or Weber Carbs Run Good On The Street?

Below is a artical I found while searching the web. This is only one.....websites review.

I've always liked the look, of stacked injection, especially with Cobras and GT-40's, but even with computers controling the system, how are these on the street ?

Why wouldn't these work as well as our daily drivers, are the aftermarket computers just not up to the task, ....yet, or it just depends on the company's computer software ?


Do 8 Stack EFI or Weber Carbs Run Good On The Street?
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Old 07-11-2016, 07:34 PM
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Webber carbs every one says no. Efi works awesome as long as it's a multi port system.
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Old 07-11-2016, 07:57 PM
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Carbs no, electronics stacked EFI yes ?
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Old 07-11-2016, 08:05 PM
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I was advised to stay away from webers. Efi if it's a multi port system can be set up to run awesome. Just need an efi tuner who understands efi. The self learning I don't like.
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Old 07-11-2016, 08:18 PM
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I'm confused. The type made by TWM/Borla is a webber carbed system, but compurterized, correct or am I missing to many brain cells ?
Since the fuel injectors are contained inside the throttle bodies, unlike other similar products.
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Old 07-11-2016, 08:36 PM
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Webers are a type of carb. The Borla is efi that looks like weber carbs.
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Old 07-11-2016, 11:19 PM
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I've been running Weber 44 IDFs on my tiny SBF, I've put 14,000 miles on in 15 months of driving and once they were set up, have had no problems. Easy starting, great response, and a lot oh "holy sheetz" when the hood is open and people take a look. I've had it at sea level and at 10,000ft. elevation. Did notice less power at elevation, but not enough to worry me. Just had to be a bit more judicious in my passing decisions. That being said, I've never had stack injection (except the Crower mechanical on a C Altered 57 CHEVY, 45 years ago) I'd think the electronic stack would be the best of both worlds with its tune-ability and its uber cool appearance.
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Old 07-12-2016, 12:15 AM
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A lot of guys with big blocks the 48 Ida is too small. I think the efi stack guys run bigger trumpets to get big power.
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Old 07-12-2016, 12:25 AM
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Quote:
Originally Posted by fordracing65 View Post
A lot of guys with big blocks the 48 Ida is too small. I think the efi stack guys run bigger trumpets to get big power.
Yes the 48 is too small, but you can buy 58 or 60 IDAs from Gene Berg.
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Old 07-12-2016, 04:34 AM
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Quote:
Originally Posted by Gaz64 View Post
Yes the 48 is too small, but you can buy 58 or 60 IDAs from Gene Berg.
Hey Gaz,

Is it not true that:
48s are suitably sized for street on an FE, even a big bore FE.
The limitation here however is that 48s will choke the engine starving it of air at high rpm. Therefore they are at their best in midrange power delivery, street flowing circuit type course use, as opposed to drag racing or oval track.
The 58s from Gene Berg that cost a motza (and are out of stock) shift the power to a higher rpm range, and intact could adversely affect street driving in the common low to middle band experienced in street driving, by reducing air velocity.

Or is my humble research ill informed?
Are you able to kindly clarify this?

On another note: I believe webers ARE workable for a street engine. EFI or otherwise. The only limitation is the the time energy money and inclination one has to invest it them. For a car that's driven as infrequently as most Cobras are, I've placed them in the who could be farked category, for now. As I'm unlikely to drive them often enough and far enough to resolve and sort the issues.
That said I still do find myself tempted. :

Thanks in advance.
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Old 07-12-2016, 04:36 AM
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I have the Mega Squirt fuel injection on my Coupe and like it. I did have the power cut back on the engine when I quit racing it and it works very well on the street and in our mountain roads.

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Old 07-12-2016, 06:14 AM
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I'm just going to put this lil' photo here. Lot's left to do before this engine is where I want it, but for now it starts easy, idles at 6-700 RPM and is super easy off the line and put putting around town. Pretty much the opposite of what the article suggests. Hell, I don't even use 1st gear unless trying to go up a hill off idle. The article talks mostly about Weber carbs as opposed to EFI, though.
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Old 07-12-2016, 06:42 AM
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All you need to do is drive the car harder. The webers do not like to be dogged around town. An occasional "Italian" valve job does wonders.
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Old 07-12-2016, 08:00 AM
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There is a company name Fitech that has been in the EFI background on the OEM side. I read many of their reviews on different forums and have found almost nothing but positive reviews.....that is strange. These guys don't have a EFI version of stack injection but they offer many throttle body EFI setups and are releasing a multi-port setup. This may be an option you want to check out.
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Old 07-12-2016, 10:02 AM
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Any engine has to have all the parts working together. Know many who use T.W.M 8 stack including two I have running. Have had one in csx car for 8 years on road, idles 700 rpm and takes off from stop as good as zo6. Just had in parade for hour hauling Gene Winfield, stop and go for miles. Engine is 468 f.e. built by Kroyer in Las Vegas. Know of at least 12 more engines built by them with same injection setup. Just picked up engine from Rex Racing and putting in Bennett car now. Had engine freshened up and put older T.W.M. setup I had on engine, makes over 500 lbs torque at 2500 rpm up to limit of 6500, will fine tune on dyno and street. Expect second car to run as good as first. Csx car has Motec controller and Rex Engines likes to use Holley controller. Ran good on Engine dyno, will see how works on street, don't expect any problems.
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Old 07-12-2016, 02:53 PM
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I'm very happy with the Webers (four 48IDA's) on my 521 big block. Once we got them dialed in (about two years and 5000 miles ago) they have been great since. I would not go back to the single Holley that they replaced. Throttle response is quicker, car feels faster, starts right up hot or cold, and it doesn't suffer from the run-on (dieseling) I got with the Holley.


Quote:
Originally Posted by FUNFER2 View Post
Below is a artical I found while searching the web. This is only one.....websites review.

I've always liked the look, of stacked injection, especially with Cobras and GT-40's, but even with computers controling the system, how are these on the street ?

Why wouldn't these work as well as our daily drivers, are the aftermarket computers just not up to the task, ....yet, or it just depends on the company's computer software ?


Do 8 Stack EFI or Weber Carbs Run Good On The Street?
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Old 07-12-2016, 03:08 PM
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Quote:
Originally Posted by Gary(SF) View Post
I'm very happy with the Webers (four 48IDA's) on my 521 big block. Once we got them dialed in (about two years and 5000 miles ago) they have been great since. I would not go back to the single Holley that they replaced. Throttle response is quicker, car feels faster, starts right up hot or cold, and it doesn't suffer from the run-on (dieseling) I got with the Holley.
Do you find the linkages to be stable? I've heard that many folks have to rebalance them frequently. A friend, not a tinkerer, eventually gave up trying to set them up but I think he was using a cheap vacuum cap.
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Old 07-12-2016, 03:19 PM
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Can you run a big cam, with little in the way of vacuum ?
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Old 07-12-2016, 04:06 PM
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I've built a few weber carbed engines of different capacities from 75 - 360 CI.

Each one runs smoother and pulls from lower rpm better than anticipated.

One was so smooth, almost EFI like with a 245 @ .050 camshaft.

It is all about combination.
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Old 07-12-2016, 04:17 PM
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Quote:
Originally Posted by Dimis View Post
Hey Gaz,

Is it not true that:
48s are suitably sized for street on an FE, even a big bore FE.
The limitation here however is that 48s will choke the engine starving it of air at high rpm. Therefore they are at their best in midrange power delivery, street flowing circuit type course use, as opposed to drag racing or oval track.
The 58s from Gene Berg that cost a motza (and are out of stock) shift the power to a higher rpm range, and intact could adversely affect street driving in the common low to middle band experienced in street driving, by reducing air velocity.

Or is my humble research ill informed?
Are you able to kindly clarify this?

On another note: I believe webers ARE workable for a street engine. EFI or otherwise. The only limitation is the the time energy money and inclination one has to invest it them. For a car that's driven as infrequently as most Cobras are, I've placed them in the who could be farked category, for now. As I'm unlikely to drive them often enough and far enough to resolve and sort the issues.
That said I still do find myself tempted. :

Thanks in advance.
Yes all true, up to a point.

I agree the 48s are good for mild to slight aggressive street manners, but on a big engine will limit top end.

Here is some beautiful 58s of a fellow member:

58 mm Berg IDA Carbs--Here They Are

Gary

Last edited by Gaz64; 07-12-2016 at 04:25 PM..
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