Hi all.. This is my first message to this page. I am from Finland so my inglish
suck´s..

I have this 66 F85 olds on my yard whit 455 70-72 whit G heads, so i think
it has 8,5 compression. I am going to make some power out of it.
I think someone might know will this opinion work and how meny horses it will make.

Porting G heads and mill them 70cc, Edel Air cap, CompCams factory
muscle 194H, Hei and Msd 6AL, maybe need 2600 Stall, Flowtech headers.

And if enyone can make provements i´l be glad

 

Even milling the heads to 70cc still only gives you approx 9.4:1 or so. For that compression that's too much cam and intake.
I'd go with something in the mid 220@.050 range and the regular Performer, even with ported heads. I think you'd be happier with the throttle response and overall drivability.
Just make sure if the heads are ported well that you give it some lift, I'd say definitely over .500, more towards .550 or so.

 

Just to add some to what cutlassefi said, if he really does have a low compression 455, then unfortunately he's not getting 9.4:1 compression by milling the heads to 70cc. Mine are now right at 70cc, and even with the .011 Cometic shim gaskets (4.20 diameter) and 38cc pistons sitting .035 below deck , my compression is barely at 9:1.

 

You're right, I had a brain fart. I was thinking a 23-24cc dsih not 38. 23-24 is a small block.
Plus the actual compression ratio to start with is much closer to 8.0:1 than 8.5:1.

Yes, he'll need to stay conservative on his cam and intake.

 

Ha, the "brain fart" was for me since i originally wrote something about this thread being from March 2012 which of course it wasn't.

How about something in the neighborhood of this cam for FinOlds?
http://www.lunatipower.com/Product.aspx?id=1722&gid=287

 

Welcome to CO. Sounds like you already got great advice on the engine, how's the rest of the car? Any pictures?

 

Even though I'm a Lunati dealer I very seldom recommend the VooDoo cams. They're very hard on parts and even though they're dual pattern cams, they use the same style fast lobe on the exhaust side as well. That limits the rpm range.

We'll need to see what his final combo will be but I'd probably do something a little slower and with more lift, as he's porting the heads.

 

Good answers.. i taught ewery one think i am stupid or something

That lunati torque monster is good opinion put i think first mill heads and look what is real compression. Why cam need high lift? i had heard that .500 is pest max lift if whant little more rpm..

What is different petween edel Air-cap and performerRPM ?
Is this cam good whit 2000 stall? or need more? i have TH350 and 3.23 gear
8,5" rear.

Hmm pics I have winter pics

 

And soon f85 roof will be white..

 

Looks like a great car to build on. Best of luck!!

 

Thanks for ansvers to eweryone.. i think to get car on brake dyno first to see what is Hp whitout those power differings.. i put here dyno fact when i get it..

If enyone is iteressed what kind oldsies i had have before f85 go and see:
https://classicoldsmobile.com/forums...tml#post522962

 

Need a little help for my new HEI performance kit. I bought HEI distributor and 50k volt coil,
High energy module, cap and curve kit.. i havnt make enought performance yet so i need help to choose right springs for curve.. So opinion 8.0 or 8.5 comp, olds own cam an g heads.. sould i shoose the mid or light springs..?

 

Start with one light Spring and one Medium Spring. See how this performs.

Hope this helps

Danny

 

Thank you, that opinion works creat!!

 

If both light springs feel better, leave them in, if worse, change back.
Every engine likes different things.

 

Hi all.. Now i start this episode again.. i had have dyno this origin engine and those specs are in engine thread.. So i continue here to start buid new engine..

Specs are the same as before. Now chanse come on pistons to make more compression.. so i will put 0.30 over size pistons whit 3cc and mill those heads 70cc so can i use cranecams H-272-2 cam? and i think edel AIR-Cap work?

And i startet to port G heads

 

Hi all i shoos my opinoin now again and had buid engine far now. I start build this 455 for E85 fuel.

455 block whit all jobs.
17cc Pistons
G Heads milled 70cc and full pocket porting
Edel Performer Rpm 290/300 Cam 0,500/0,520 lift
Flowtech headers 1.3/4" portet
Holley 750Db whit 90 jets secnd 85 jets
Th350 shift kit + 1800 stall
rear end 3,42
Edel Victoy Portet


Hope to get +400HP

 

I wouldn't use the Victor intake with that combo, bad choice imo.
Performer or Performer RPM

And that cam will be a bit lazy, there are better choices, sorry.

 

I choose Victory cause it has large runners for portet heads and 455 has down torgue allways even whit long tunnels from imo. That cam is choosen for this daily drive and if i whant some day supercharger or NOS i think it will work?

 

That cam will be fine if you're headed towards nitrous or boost. But that intake is still wrong for the combo.

Jmo.

 

Thanks.. I will consider that RPM air-gap.. i just don´t think it has enough material to take off those intake runners. heads has big intake runners..

 

.

The ports can only be so big, otherwise you'll hit water

 

Just an FYI--- the Air gap won't fit under your 66 stock hood.

 

Hmmm, I was told it would.

Well then I'd do a Torker way before I did the Victor.

 

Torker barely fits... you have to run a super drop base air cleaner- and it still rubs. I dont recall the exact dimentions but the air gap is at least 1/2" taller still.

 

Carb pad height;

Performer 4.95"
Torker 5.05"
RPM 5.54"
Victor 7.00"

I wouldn't think twice about using a regular Performer. It has a big plenum and is a great all around intake.

 

I am buildin this engine for max 6000RPm. so i think performer is out of opinion. I am going to make new hood from glassfober so fit is not a broblem te original hood will stay garage..

 

Does enyone knows how to build good underpressure to the block cause the R85 fuel usage makes major panting. I know that i have to take that steam out of block or ethanol will harm engine when it mix whit oil.

 

Dear FinOldsMan; Sir, I have been reading your threads and I wanted to mention that your understanding, or translation of english let you down. I could'nt make out what you were asking. I mean you no disrespect!
Regards!

 

Sorry my bad english. What i mean is E85 Ethanol fuel, does not bur all on combustion and prosent of the ethanol change to "steam". "Steam" blend whit engine oil and it not enymore lubricant bearings. So i have to make vacuum, like more of flow thru method on block to get the "steam" out, before it´s blend whit the engine oil.

Hope to get this right.

And i ask cause hope somebody know how to make that.

 

He is saying: E85 ethanol fuel does not all burn in the combustion chamber, and a percent of ethanol converts to a steam that can get into the oil and ruin the lubricating properties of the oil.

He is wondering how to properly setup this vacuum system.

 

Yes that i mean..

 

If this is a new build, why would you have blow by excessive enough that you would need a vacuum pump?

E85 will run fine in it if setup correctly, without a vacuum pump.

 

Hi; I agree with "cutlassefi" If the engine is built with the correct tolerances, there's no reason to worry about oil viscosity dilution, from e-85. The only reason to have a negative vacuum in the crankcase is to keep the piston rings from "fluttering" in full out drag race engines, with edge ported pistons as was invented by "Bill Grumpy Jenkins". In that instance he used exhaust gasses to pressurize the rings for a better ring seal. Another system consists of two "gulp valves" angle welded to each exhaust header. Then the valve covers are ported by 1" rubber hose to the directional, "one way" Valves. I have seen both systems used in drag racing.
Dont forget that e-85 is very harmful to plain rubber fuel lines too. what you want is fuel line rated for use with the higher alcohol rating of e-85. It's called "barrier" type hose, and there are two types...carbuetored low pressure, and higher pressure for fuel injection systems.

 

I build HST fuel lines for this. Hmm Some new cars whit flexFuel has lower mileage for oil chanse. What i had heard is R85 usage must engine oils chanse half mileage of normal.

 

I buy valve caps breathers whit noses then i weld pipes on collectors and have good vacoom on block. Next i order an labda to have fuel mix correkt

 

Hi. I was re-reading through the body of messages, when somthing caught my eye. After mentioning fuel lines set up for E-85, I was wondering if your 750Db carb. is also set up for alcohol, with Vitron seals and gaskets.
Regards!

 

yes it is. its a set from summitracing. I hope the 90 jets is correkt for opinion, that will see when got started and lambda shows...

 

Does enyone have The PLX Wideband AFR lambda? Hope this work.

http://www.plxdevices.com/product_in...DBDSMAFR_DM6G3

And i order MR-Gasget CRANKCASE EVACUATION SYSTEM - part # 6002, For "Steam"

 

90 size jets sounds like a good starting point. I remember guys running alcohol at my old dragstrip, were running jet sizes much higher than I was with gasoline. This advice is for everyone else running straight gas....For 350+cu.in. motors, My Holley 750 mechanical secondary, "double pumper" had 72'size jets "square" on all four corners, the "pink" accelerator pump cam, and a 50cc deeper style (front only) accelerator pump diaphram & body. The motor will sound SOOO crisp, and responsive!