ok so I'm getting things together to build a street rail the engine I'm using is a 4.9 out of what I believe to be a 92 Cadillac Seville, the tranny is a Getrag 282 I believe from a Beretta quad 4? because I'm not putting it in another car I plan on swapping out the Fi to carb yes I know Fi is typically the way to go but I plan on ditching everything electrical other than a key. and the Fiero guys seem to have the best knowledge of the 4.9 and trying to make it what anyone would want it to be so what I'm asking here is
1. how do I mount a carb to a 4.9? what's the best carb to go for? and what I need to do to the intake manifold or what one I need to swap to make it work the for the most power and easiest to work with?
2. distributor? what one to use and how to modify it to make it work the best?
3.what wires will I still need?
and thank you in advance for all your help
[This message has been edited by j-rod89 (edited 09-18-2013).]
You need a Mr Gasket 2brl adapter / spacer to bolt to the stock intake manifold. then you would use a Holly 500 CFM 2 brl carb. or for that matter any 500 cfm 2 brl. The disty you would use if from a 350 BOP V8 mid 80's i believe. Is Bubbas web site still active? If his site is up still it had all the info you needed. that is all i can remember from way back when.
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**************************************** 88 Formula CJB Arrived Finally. #689 of 1252 Time to start Working TONY! There are Two kinds of Fiero's : Notchies and Donors! Click here for My 88 t-Top Build
ok so I'm getting things together to build a street rail the engine I'm using is a 4.9 out of what I believe to be a 92 Cadillac Seville, the tranny is a Getrag 282 I believe from a Beretta quad 4? because I'm not putting it in another car I plan on swapping out the Fi to carb yes I know Fi is typically the way to go but I plan on ditching everything electrical other than a key. and the Fiero guys seem to have the best knowledge of the 4.9 and trying to make it what anyone would want it to be so what I'm asking here is
1. how do I mount a carb to a 4.9? what's the best carb to go for? and what I need to do to the intake manifold or what one I need to swap to make it work the for the most power and easiest to work with?
2. distributor? what one to use and how to modify it to make it work the best?
3.what wires will I still need?
and thank you in advance for all your help
If the getrag came from a Quad 4... the bellhousing is not the same as a 4.9 bellhousing pattern.
As for the distributor... You will need to find a HEI distributor from a 1975-1980 oldsmobile V8 ( 350, 455, 403, etc).... You will need the inner shaft and the mechanical counter weights from the oldsmobile distributor and use aluminum distributor body from a 4.1 or 4.5 caddy distributor. The oldsmobile shaft will need to be cut shorter (same length as the caddi shaft)... It will then need to be redrilled so you can reinstall the roll pin that holds the lower gear in place.
After that you just need one power wire for the distributor.
[This message has been edited by MaxCubes (edited 09-24-2013).]
Is there anyway for me to measure to know if it came from a quad 4? I didn't pull it myself I bought it off a kid I think he said that's what He pulled it out of
[This message has been edited by j-rod89 (edited 09-19-2013).]
first off you do not use the 4.9 dizzy at all. You need the earlier 4.1 or 4.5 dizzy for the casing to correctly fit the Olds guts.
the intake on the 4.9 is actually pretty efficient. It is a dual plane intake, however, it is a 3 bolt so you need to make an adapter regardless.
To pass visual inspection from the smog nazi's you will want to keep your EGR. The Rochester 500 clears it, but the Holley does not. I made a 1.5" phenolic spacer for my Holley to make it clear the EGR. The venturi of the 500 cfm carbs do not line up with the intake runners. Your conversion spacer will be offset and is a little tricky to make
In NY there is no emission inspection on home made vehicles only a safety inspection. Basically brakes lights windshield seat belts horn and your good to go so can I just take the egr out and plug the hole?
I just put an edelbrock 600 on my card 4.9.... I'll send out all the info plus pics of the mods I made to the intake and exactly what dist I used. Gets some sleep I'll hook you up tomorrow ..you did ask the rite forum for help..we are in the Know....LOL.....
I used a Holley 500 duce but the Edelbrock interests me. Either way you need a conversion spacer, and the intake runners likely flow to 600 because they are bigger than the 500's venturi. However the engine flows, so I've been told, to a maximum of 487 cfm at 5000 rpm. So the design of the spacer and the performance of the 600 would interest me allot and I'd sure like to know the outcome,
Is there anyway for me to measure to know if it came from a quad 4? I didn't pull it myself I bought it off a kid I think he said that's what He pulled it out of
As for the tranny bolt pattern, put a pic of it up someone will know from looking at it probably.
1. when you change your water pump, the new ones do not have the timing tab. Mark your timing on the bolts or time with a vacuum gauge 2. don't underestimate the torque on the engine mounts. It is substantial 3. the distributor conversion is pretty easy but get your shaft length right. The cam can eat the gear if it is not correct.
Thanks for all the help guys! I'll take anything else you've got! I figured this was the place to come to!! And all I have to take pictures and put them on with is a phone and I can't figure out how to do it sorry I'll try to figure something out
Ok so I can't for the life of me figure out how to get picture on here I think it has something to do with the apple format? But I looked up gm 60* v6 on google images and I think some how I got the right tranny!
A couple more questions though.
1. What kind of clutch should I run?
2. What kind of fuel pump I'm thinkin and inline electric pump? Mayb a 15 gallon cell?
3. Ridged or rubber motor mounts?
And thanks for the help so far you guys have been great!
ok so this I think is the same tranny I have! mine has slightly different throw out forks and slightly different webbing inside the bellhousing but the pattern is still the same
[This message has been edited by j-rod89 (edited 09-28-2013).]
Ok so I can't for the life of me figure out how to get picture on here I think it has something to do with the apple format? But I looked up gm 60* v6 on google images and I think some how I got the right tranny!
A couple more questions though.
1. What kind of clutch should I run?
2. What kind of fuel pump I'm thinkin and inline electric pump? Mayb a 15 gallon cell?
3. Ridged or rubber motor mounts?
And thanks for the help so far you guys have been great!
The carb'd 4.9 puts out more torque and power than OE. I currently have a Centerforce II that is rated at 290 ftlbs and it does break loose at about 3000 rpm in 4th gear. I have a Spec II +plus rated at 417 ftlbs in the box ready to go on. (soon)
I use the stock Fiero v6 fuel pump with a Mallory bypass regulator. With the bypass reg your pump runs really quiet and smooth, and there is no creep. Once it is locked it is as permanent as you need it to be.
I welded up hard mounts. The motor is really torquey so I have the side mount, the center mount, and a stabilizer made out of the old v6 dogbone support rod. It needs it. The cradle has its own rubber bushings and the engine is smooth so you really don't need rubber. Also, with solid mounts it is easier to put on an exhaust that won't work loose.
I should add that you don't want your mounts to be too light. There is a pretty big torque factor in what you are building. My first one broke. The present ones won't, fo' sho'
Ok so I was at the scrap yard a couple days ago and pulled an 88 4.5 distributor. Do I keep the cap on the 4.5 and scrap the guts or scrap everything other than the housing?
ok so this I think is the same tranny I have! mine has slightly different throw out forks and slightly different webbing inside the bellhousing but the pattern is still the same
The bellhousing pattern in this photo is correct for the 4.9
Ok so I was at the scrap yard a couple days ago and pulled an 88 4.5 distributor. Do I keep the cap on the 4.5 and scrap the guts or scrap everything other than the housing?
Keep the 4.5 cap (4.9 cap is the same).... the oldsmobile cap will not fit the 4.5 distributor housing
To clarify, the Olds cap uses the 2 hold downs that turn and lock.
The Caddy housing uses the 4 hold down screws.
I ended up with 3 HEI coils, the original, the Olds, and the 4.5 coil
I used the new Olds coil. I bought the Olds dizzy from Rockauto and stripped it. That way I had new guts. Also, you want the Moroso SBC spring/weight kit and load in the lightest springs. This way you get full advance and all in at 4000 rpm. It makes the engine very peppy
Any idea how to get the pictures for this post - seem to have been deleted. Got all my parts together to assemble the distributor but the step by step photos are gone Thanks
I am not trying to start an argument by comparing modern MPFI systems to the ancient Carburetor, but in NY you just will not get by emissions testing with a carburetor setup. Your gas mileage will also be out the window but I don't know if this is important to you. I know guys with stock 4.9L swaps that get 29-30 hwy mpg . If you insist on going with a carburetor then do it but bear in mind what I said.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
I used a Chevrolet quadrajet (side inlet) on mine. Made an adapter from 1/2 inch aluminum plate and a square to spreadbore adapter. Fits great and the small primaries should keep gas mileage reasonable. I have a couple of videos on youtube you might want to check out.
