4.3 Vortec build up and traps

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Good article and it validates this peice http://www.bid2race.com/tech/Vortec_Heads_Max_Lift.html and your application...Things are getting much simpler and less expensive. Can anyone tell me "safe" rpm speeds a volvo sx-m can run at...5000 i know but again i cannot find the acceptable rpm band for that drive..

 

[Mkos1980]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

I cant answer you ? but if you want to save money on springs, you can pick up a set of LS6, LS7 valve springs on ebay pretty cheap that will work the same.

 

[superpop]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Why are you going from TBI to Carb. Doesn't this make HP drop.

 

[Mkos1980]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Why are you going from TBI to Carb. Doesn't this make HP drop.

No. Other way around!

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Why are you going from TBI to Carb. Doesn't this make HP drop.

From ever thing i have read the tbi throttle body just does not flow enough air and there is no one that i can find that will program the software to accomdate larger cam profile's..Ive been watching this topic for over a year now...Its a bit like walking down a dark alley looking for answers but they are there.

Edited: EFI is a more effeicent form of induction. It is by far more precise and will create more power than a carbed system..There is one huge difference. All efi systems are controlled by some type electronic prosessing...it is a preprogrammed software that delivers fuel....a very precise amount calculated every 200 rpm. When you change something like i am you need to go back and recalculate all of those injection rates.....Mind numbing if you dont know how...AKA the carb is a simple solution...primitive but it works.



http://www.carcraft.com/techarticles...ade/index.html

http://www.bid2race.com/tech/Vortec_Heads_Max_Lift.html

Notes: CCA-56-460-8 (cam 270ahr) $259.95
Edited http://store.summitracing.com/partdetail.asp?autofilter=1&part=CCA-26918-12&N=700+115&autoview=sku
Valve Spring Retainers $51.39
Edited http://store.summitracing.com/egnse...se&Ntk=KeywordSearch&DDS=1&N=700+115&x=40&y=4
Timing set $85.95
Push rods $25.95
Valve Locks $16.95 +
Total $726.09
carb $335.95
Intake $ 244.95
Totaled 1306.99

Edited to include http://store.summitracing.com/partdetail.asp?part=arp-100-7201

http://store.summitracing.com/partdetail.asp?autofilter=1&part=EDL-1409&N=700+115&autoview=sku

http://store.summitracing.com/partdetail.asp?part=EDL-2114&autoview=sku

 

[180shabah]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Why are you going from TBI to Carb. Doesn't this make HP drop.

Only in the marketing materials.......

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

The mechanical side is pretty much complete, from here it seems there are only two issues...fuel dilevery which sould be as simple as installing a mech fuel pump. But after stripping the efi system i have one question .....will i be able to run the dist assy..that is do a work around or would it be much simpler simply to go to a new product??

Any insights in advance would be very helpful..

Note the entire system aside from the main power box will be removed no left over parts.. out with the old in with the new aside from the dist assy hopefully..

 

[Don S]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

from here it seems there are only two issues...fuel dilevery which sould be as simple as installing a mech fuel pump.

There is no fuel pump push rod hole machined in the block, so you will hve to go with an aftermarket electic fuel pump for carbs. The TBI pump will have way to high a preassure.

Which distributor do you have now?

 

[Mkos1980]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Make sure you engine block has a boss for a mech pump. I know the newer Vortec SBC motors did not come with them. You can run a Merc TB IV or V distributor system if you want. With tbi, its not "super" high pressure so you may want to keep the stock fuel pump and run a regulator.

 

[Don S]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Just remembered something, you have a Volvo TBI, not Mercriser, which means you have the EST distributor, and a high and low pressure pump. Let me check the pump pressures, but you should be able to use the low pressure pump (and filter assembly)
You will also have to do some rewiring to get the fuel system to work and the EST distributor to work.

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

There is no fuel pump push rod hole machined in the block, so you will hve to go with an aftermarket electic fuel pump for carbs. The TBI pump will have way to high a preassure.

Which distributor do you have now?

I intend to strip the current fuel cell off the boat..frankly the whole system...cam lifters all except the heads, It will be much easier to sell as a complete bolt on system rather than a hodged pile of parts..I cant tell you why but i was damm sure the block was setup up with the mounts for the mech pump ill check it in a few hours..

As to the dist assy its a stock volvo tbi system


2001 PEFS GREY ANCHOR..as noted above..

 

[Don S]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Well, the fuel cell itself lists for $635 from Volvo, and any electric fuel pump will work.
Did you also part with the wiring harness? I would hope so, but it does mean you will have to rewire everything, and find connectors for the coil.

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Well, the fuel cell itself lists for $635 from Volvo, and any electric fuel pump will work.
Did you also part with the wiring harness? I would hope so, but it does mean you will have to rewire everything, and find connectors for the coil.

Cable harness38600371 $698.00 That the GI

Cable harness38600361 $698.00

and the gl this is gonna be messy

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

GI Dist

GL Dist

nice pics no legends.....:redface:

 

[Mkos1980]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

You can run any external coiled distributor from an 87 and up 4.3L motor auto or marine. The HEI's are already marine approved from GM with the spark screens on the dis base. You can pick the whole setup for about 25 bucks on ebay. The ignition module under the cap has a curve built in already thats suited for marine use.

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Thanks again Mkos1980...like ive said..it's like walking down a dark alley and boom ya run into things along the way...Something tells me this wiring is not going to be such a big issue..Hopefully a boat has engine flexabiltiy built in...aka the mfg can plug in either a Gi or a gl into the harness i cant imagine having to wire a boat for the engine..but then again.. parts are a high profit center for any company..

After going this far as long as you get the cast part for a 4.3 one just takes 5.7 parts and adapts them to the 4.3 .. aka 4.3 cam with 5.7 valve train parts..

 

[Don S]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Wiring will be nothing, matter of fact, you will need less.
I'll post some diagrams when the race is over. (My guy is leading )

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Wiring will be nothing, matter of fact, you will need less.
I'll post some diagrams when the race is over. (My guy is leading )

Edit's: Ruhh ohhh.....

 

[Don S]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Ok Don if your connected to some hooligan that goes by the name of Wize Guy ....i do know where you live.....besides that he's actually runnning a Ford...

Not sure about any of that, but all you need for wiring is this.

What you have now, is this.

Your job, should you accept it, is to change it to look like this.

Bummer, my driver was the FIRST looser

 

[Tail_Gunner]

Re: Cam profile ( reversion)

Re: Cam profile ( reversion)

Not sure about any of that, but all you need for wiring is this.

What you have now, is this.

Your job, should you accept it, is to change it to look like this.

Bummer, my driver was the FIRST looser

Yup even pops here can accept that..No actual wiring really after the factory engine loom is disconnected...but if i take the engine harness diconnect it from the gauge's and stater circuts is there a male plug i can use to wire the tach dist and fuel pump leads..that is create a very simple wiring harness and plug it back into the counsole...for a lack of better words..