v8 carb,holley/edlebrock????

S

stag76

New Member
hi ladys and gents.

got another p6 3500s,she runs grand,but with this one id like to improve the carbs in some way.

I know your all going to say su are the way to go,and simple and reliable etc.

I picked up a holly 4 barrel 500cfm carb,and a facet red top pump.

im now looking for a inlet manifold,edlebrock or some other maker,anyone??? :)

I know im just keeping engine standard for now,but plan a 3.9 engine for next year.

anybody fitted one of these carbs,and whats involved?? jets,secondry vaccum set up etc.

in futre,whats the best useable cam?let me know your thoughts


jay
 
hi,just checked there,its a cfm 390,bought it of a chap who had it on a 3.5 range rover. range rover a lower compression engine,make any difference???.

any leads on a manifold,i know they can be got new,be nice to get a second hand,mellow looking one :wink:

jay
 
If it's a 390 with vacuum secondaries then they get fitted to 3.5 Rovers, but even they are too big for a standard engine. If it's a double pumper it's way OTT. They are a good way to use more fuel though......
 
vaccum secondrys,not a double pumper,just like to use it on p6 while I build up my project 3.9.

don't mind the fuel,as wont be going to mad with the driving :D .

hear il have to find a double plane low manifold to fit it all under the bonnet?? I got a small domed air cleaner with carb.

chap keeping his inlet,cos he going 5.0,and using a cfm 500 on his range.

any ideas of camshaft set up for the future with this carb??

thanks for all the info.

jay
 
Only way to jet a downdraught carb satisfactorily is on a rolling road. There's a good one in Blackpool.

Why not spend the same effort on your SU's? Look at the "Lucky Breathes Easy" thread. There's at least 7 BHP available there just for changing the filters (please, please, not K&N's!!!) and re needling.

If you are after extra horses then use a Thor inlet manifold with Megasquirt software.....

By the way. If you are using a high pressure pump and a pressure reducer there are a couple of things to be aware of. First we recently lost a forum members car to an engine fire probably caused by a pressure reducer dismantling itself. Second there are batches of pucka rubber fuel hose in circulation, labelled as compatible with the latest fuels, that come apart at the seems within one years use. So any piping in metal please!

Chris
 
hi chris,got all that.

il be using a filterking,filter/regulater.

ok,ill look at that breath easy post.

just im sort of on the horses back with the outlay of buying carb,pump,filter etc. be nice to get a bit of use out of it for now :) .

ive come across bad fuel pipe already,so im well aware of its splitting.

any thoughts on manifold??
 
Hi Jay .
Just a thought , have you tried the V8 owners forum ? More likely to find non standard / performance parts there .
 
Sparky uses an offenhauser twin port manifold, which uses smaller passages when running on the primaries, meaning a higher air speed and therefore less chance of the fuel dropping out on a smaller engine like the 3500. It's supposed to give better performance and fuel economy as well.

Also uses the 500cfm weber carb, (edelbrock with the sticker removed) if that's any help.

I have to say though that it is on a 3950cc engine with a lot of mods, so not sure how they work on a standard 3500 set up

Richard
 
chrisyork wrote,...
If you are after extra horses then use a Thor inlet manifold with Megasquirt software.....
Click to expand...

Sorry Chris, the Thor manifolds were designed primarily with torque delivery in mind, hence the use of long runners of small cross sectional area. Power delivery is thus very difficult to improve upon. The Tempest manifold offers significantly more potential for improving power delivery.

Hi Jay,

An Edelbrok manifold is certainly an excellent choice. For a road going car, the carburettor should always be smaller rather than larger in CFM delivery, as throttle response will be very compromised. For a track car, bigger is fine as the engine largely only sees full throttle.

Ron.
 
great info lads,thanks.

im planning to put this carb on a tuned 3.9 in the futre,just was going to try it on the car now,

so its the edlebrock inlet I need.

keep the suggestions coming.

thanks jay
 
The Edlebrock manifold is certainly the way to go, dont know about the Holley however, the CFM is probably a bit large, having said that, there are a lot of them about.
I opted for the Weber 500 as the carb infrastructure is more suited to smaller capacity engines with primary and secondary volumes, and a vast improvement it was over my tuned SU's (you can see i am biased :LOL: ).

Graeme
 
The Tempest manifold offers significantly more potential for improving power delivery.
Click to expand...

Now this is an area where I definitely need some education! Have you photos, or links to photos, of the Thor and Tempest manifolds, Ron? I'm rying to improve my thesis of stick to SU's and if you want seriously some more power go injection.... But which one?

Chris
 
chrisyork wrote,...
Now this is an area where I definitely need some education! Have you photos, or links to photos, of the Thor and Tempest manifolds, Ron? I'm rying to improve my thesis of stick to SU's and if you want seriously some more power go injection.... But which one?
Click to expand...

Hi Chris,

Here is a link which contains photos of a vast array of inlet manifolds for the Rover V8, some by the look of it would cost an absolute fortune!
http://www.mez.co.uk/ms12.html

Ron.
 
I would second the idea that you should check in over at v8forum.co.uk . If you really want to go the holley style route then you need to talk to a chap called "sidecar" who is excellent. :D

As said above fuel injection is the real way forward, mega squirt transformed my 3.5 powered Land-Rover, and I will be doing them same on my 3500s when time and funds allow! At the moment though it is waaaay down my list of jobs to do on the car :(

Good luck!
 
Holley 390 atop an Edelbrock Performer intake manifold with a Kent 214 fast road cam and block hugger mild steel tubular headers made my now departed 'organ donor' 3500 Automatic take off like a rocket and keep pulling strong all the way to 140mph (though my 14" SD1 Vanden Plas alloys wore 65/215 tyres so the correct speedeometer reading would more than likely actually have nbeen 120mph). Viper Hurricane cam would suit a manual transmission with the 390/Performer, even more ooomph than the 214 but still street driveable. Have fun, hope you've got deep pockets 'cos eitehr way it'll drink like a fish! Oh, and avoid the triangular-with-rounded-corners foam under mesh Edelbrock air filters, if you get a backfire they melt or catch fire! K&N make a nice 'low-rise' big round filter which fits.
 
SydneyRoverP6B said:
chrisyork wrote,...
Now this is an area where I definitely need some education! Have you photos, or links to photos, of the Thor and Tempest manifolds, Ron? I'm rying to improve my thesis of stick to SU's and if you want seriously some more power go injection.... But which one?
Click to expand...

Hi Chris,

Here is a link which contains photos of a vast array of inlet manifolds for the Rover V8, some by the look of it would cost an absolute fortune!
http://www.mez.co.uk/ms12.html

Ron.
Click to expand...

My research in hunting for a torquemonster 3.5 engine (I already have a mad revving sillyness car - so I want low end grunt) has led me to purchase a variety of bits. I'm planning on a system (awesomely dubbed ThorteenCUX on another forum!) combining the torque biased thor manifold with a 14CUX system. I've also collected an earlier flapper system to have a play with as well, thanks to RedBarchetta on here :) I've said before that it's a bit hard to work out what's right as everything is focussed on POWER! when I want torque..
 
hi lads,all this info is great.

I hear I shouldn't have bought the holly dome air cleaner,fire hazzard :shock: .

ill have to go through all your posts and take notes,great stuff :D

davecol,how are you,your a Dublin man I see,im in wexford. have to get your number,mine is 086 895 30 80,drop us a call for a chat.

sold the last p6,got another now 8) .

met a few p6 owners at teranure show last sun.

keep the info coming lads.

thanks j
 
Hi stag76, the Edelbrock manifold is ED2198 low rise suitable for P6B, I'm thinking along those lines as my engine rebuild progresses with the Edelbrock 500cfm carby (which is the smallest size they do) EDL1403 (manual choke), but then I started drooling when I came across this EFI system, http://www.atomicefi.com/

Regards,
Scott
 
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