Horsepower Guestimates, please, and E.T. range, PLEASE!

Thanks, as always! I was pretty close at my original theory of 11.5

Ranger
Aiken, SC

 

Oh, that doesn't surprise me at all regarding the cams' being off a coupla/few degrees. Sad, but not surprising, as I said.

 

Be a dog then....I'd go 4deg adv

 

That's why adv would help....

 

Good point, Larry.

I've been building engines for 52 years tho not at all full-time. But I've always been worried about, and tried to account for, timing-change stress, which is inevitable. Of course, that depends on myriad factors: quality of the chain, nylon gear or steel, double-roller or stock, etc.

So, when I didn't degree a cam, and I often did not since customers didn't wanna pay, I always tried to install them 2*-4* advanced--whenever I could buy an offset key or any other way to adjust the timing. Sometimes there was not one available.

But I remember about 30-years ago I bought the double-roller set w/ three key-ways. It wasn't billet and prolly got in from Kenne Bell. It was sloppy as hell even tho the engine had not yet even been line-bored.

I never bothered to measure it, and it would depend on all the factors I mentioned above, but most chains will, after 40k miles or so, stretch at least 2* and maybe 4*. I am just guessing but the point is the chain starts to stretch on mile 1.

I'm too old to take this motor apart to now change valve timing or compression, so I'll just hafta soften the timing and pump up the octane w/ either a splash or race gas or a double dose of booster in a can; and some folks have reported noticeable gains w/ a coupla of the better brands.

Appreciate your help/guidance, as always!

Ranger
Aiken, SC

 

Thanks, Larry, that's the thing to do.

Yeah, most guys seem to like Torco or Boostane. I was gonna order Torco from Amazon but am confused. One product says Octane Booster and another one is called Accelerator, both claiming to boost octane. I can't tell the difference between the two so maybe it's time for a new thread?!

Ranger
Aiken, SC

 

So these smaller cams I don't know alot about and I've never seen the card for this one, but I looked at TaOnline listing and it says lobe center 114*. Now this is where terms gets mixed around some. Some manufacturers seam to call lobe center the same as lobe separation angle.....some seem to mean more like the intake centerline.

Some cams have advance ground in......so a 114* lobe separation angle would sit at an intake at 110 if the cam had 4* advance built in.

Now when says 8* degrees advance are you saying you had to move to the plus 8 mark to make the intake center line match the cam card? Or are you saying you moved it another 8* farther.......given the above example with 4* advance built in.....you intake center line could be all the way down to 102.

Not questioning your building ability but some terms get tossed around snd interchanged and to some of us it buddies the water a little.

I 1st hand know how far off some combination of crank, cam, and gears sets can be. Had a combo once thst between where the keyway was cut, the cam ground, and the timing set to get the intake center to even where the cam card called for I didn't have enough advance in a 9way set, I had ti jump the cam gear 1 tooth forward then retard the crank gear to make up the difference. I'm sure whoever was next to pull that cover off was really confused.....

 

That's what I'm saying, I know ta often as like many add 4 degrees advance......and then if the op added another 8 degrees advance that would make his intake center now at 102....very dangerous with his compression short duration and street gas.

I think I would back that off alot......with halfway respectable flow and that compression the motor will have plenty of power.....
I ran an iron head 464 with not as much flow into the high 10s with a gs110 cam and 4.10 gear

 

Thanks for checking, Larry, and confirming that it is a little confusing. It may be the same product by why the different price, then? looks like I may hafta call em.
Thanks, again!

Ranger
Aiken, SC

 

You want what says Accelerator, its a race gas concentrate , not like the octane booster that you find in regular auto stores that only boosts a small % of you 92 pump gas to say 92.8
The concentrate actually gives you 8-12 points, ive used them all, best are Boostane, Racegas Ultra, Torco, i tuned with them on my turbo cars

 

Thanks for clearing that up and for your personal experience!

Best,

Ranger
Aiken, SC

 

VP has an excellent product too.

 

That one is sold at Walmart. Thanks!

Best,

Ranger
Aiken, SC