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post #31 of 42 (permalink) Old Oct 2nd, 18, 12:25 PM
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Joe
 
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Re: 555 What do you think?

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Originally Posted by Stokerboats View Post
I leave that to the pro's. I have my personal mistakes to contend with. The current 565 makes plenty of power however, but for the same money could have made considerably more. All because I didn't want to buy another intake manifold. That said, at this point, the chassis is the limiting factor.
I understand the OP not wanting to cage the car but realistically how much safer are you at 10.01 than you are at 9.50 with a 5 or 6 point roll bar?

I didn't even have a basic roll bar in my '69 Chevelle and it was kinda stupid in hindsight. 540" was putting down right around 680 HP as installed in the car. Was hitting 125-126 on top end, starting out in 2nd gear to slow down the ET, riding on a bench seat with original lap and shoulder belts and a driveshaft loop for safety equipment.
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post #32 of 42 (permalink) Old Oct 2nd, 18, 12:35 PM Thread Starter
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Mike
 
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Re: 555 What do you think?

Ive got all the safety gear for 10 flat and to be honest everything except the hoop to go faster than that . Just don't have and won't get the hoop and down bars. Seriously with the hoop its 3-4 inches from the bean and without a helmet Its really, really not safe for street driving that way. I understand people do it but I dont think they realize the risk they are putting themselves at.
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post #33 of 42 (permalink) Old Oct 2nd, 18, 3:09 PM
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jackie
 
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Re: 555 What do you think?

It seems the OP suffers from the same problem many of us have, that is, if it is indeed a problem.

In today's world of hot rodding, it is easy to build a perfectly reliable, and very drivable, 700 hp big block. The reason is we can now build 500+ cubic inch engines by exerting no more effort than it takes for one to open his wallet.

The advent of aftermarket blocks, complete rotating assemblies, a myriad of cylinder head choices, and Hyd Roller Cams has made it so easy as compared to what we had to work with 40 years ago.

The problem is the definition of what is quick, and what is fast has not kept up. In my younger years, if you had a street car that had a horsepower to rate ratio that would theoretically get it into the 12's, that was fast. Now, it's mundane.

Heck, you can buy a off the showroom Vette Cameron, or Mustang that will easily do that.

I can not run my Malibu at the track because it does not have a roll bar or a drive shaft loop. The X pipe exhaust is plenty heavy, and would contain the driveshaft, but that doesn't count.

My top machinist has a 2017 Z06 that has the 1000 HP LMR package. He ran it one night, they told him no more.

So, I have fun on the street.

To the OP. Build you a nice street engine and have fun. It looks like what you have now will be plenty of that.
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'67 Chevelle Malibu, Catalina Blue, 540 inch Rat, Air Flow Reasearch 290 CNC Heads heads, Custom Hyd Roller, .675 lift, 234, 244 at .050, Lemons Headers, Holley Multiport Fuel Injection, TCI 6X 6Speed Automatic, 12 bolt Posi Eaton TruTrac, 3:31 Richmond Gears, front and rear power disc brakes, Global West Suspension, etc.

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post #34 of 42 (permalink) Old Oct 2nd, 18, 10:51 PM
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Bob
 
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Re: 555 What do you think?

Quote:
Originally Posted by backseat69 View Post
Took so long to get this stuff back from the machine shop I built a 496 that my dad passed on to me and the new 555 I finished today is sitting in the corner mocking me. So anyway lets get some educated guesses on HP here so I dont have to spend $500 on dyno time . Personally I'm thinking 750HP/700TQ ish. Havent decided what to put it in yet and I prefer the drag strips MPH dyno. Anyhoo Ive got a '69 Chevelle I'm building for a friend taking up half my garage so it'll have to wait a bit.

Dart 4.560" Bore
20 CC dome custom race tec nitrous dome forgings with .043 sealed power rings gapped .030". Exactly 11:1 CR
6.385" Scat H beams with ARP 2000 bolts
Manley 4.25" forged crank
Hydraulic roller Cam specs as listed below. usual 1.7 AFR roller rockers, stud girdle 180/480 springs
AFR 325 chamber CNC heads
Holley strip dominator
1050 Pro Systems 4150
locked out timing 34 ish
what size headers?
Open and closing are very similar to my cam. @ .050 are similar, Adv numbers on intake too but drift a bit on exhaust.
I'd be curious how much it really makes.

Bob
1972 Nova
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Straub Custom HR 258/260 108 lsa
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post #35 of 42 (permalink) Old Oct 2nd, 18, 10:53 PM Thread Starter
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Mike
 
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Re: 555 What do you think?

Whatever it ends up in will probably have 2" headers. Nothings so big with this combo I'd have to move up to 2 1/8"
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post #36 of 42 (permalink) Old Oct 3rd, 18, 6:27 AM
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Joe
 
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Re: 555 What do you think?

I'd wager this motor will run fine on 92-93 octane pump gas with 36* total and limit vacuum advance to no more than 10*. We ran a measured 10.5/1 CR with a 242/249 HR on 112LSA, set at 108 ICL. This motor has 1/2 point higher compression but almost 20* more intake lobe. Even running a 104 ICL, there's still about 7* of added bleedoff on the intake closing ramp. Personally, I'd probably be running a wider lobe sep cam and moving the ICL back to about 108. Especially for a street driver, there's no shortage of low end power with a motor this big, my biggest issue wasn't throttle response, it was lack of tire.
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post #37 of 42 (permalink) Old Feb 23rd, 19, 12:05 AM Thread Starter
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Mike
 
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Re: 555 What do you think?

So a little update. I decided to bag the 555 plan entirely and build a nice little injected 427 for my car instead and make it more of a driver with OD Richmond etc. Puss'ed out so to say..

I did go ahead and put the 555 together and sold it to a guy down in Southern Oregon for his 64 Chevy former race car. He took it down to run it on the dyno to get broken in and tuned a bit. With no further tuning and a bolted on Pro systems 2 circuit dominator right out of the box he managed to pull down 863 HP @ 6600 RPM and 752 lb/ft @ 5300 with over 700 lb/ft from 4500 to 6500. The dyno run was done on 100 octane but this is/was a pump gas engine.

I'd call that a good day at the dyno shop.

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post #38 of 42 (permalink) Old Feb 23rd, 19, 12:41 AM
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Dan
 
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Re: 555 What do you think?

Quote:
Originally Posted by backseat69 View Post
So a little update. I decided to bag the 555 plan entirely and build a nice little injected 427 for my car instead and make it more of a driver with OD Richmond etc. Puss'ed out so to say..

I did go ahead and put the 555 together and sold it to a guy down in Southern Oregon for his 64 Chevy former race car. He took it down to run it on the dyno to get broken in and tuned a bit. With no further tuning and a bolted on Pro systems 2 circuit dominator right out of the box he managed to pull down 863 HP @ 6600 RPM and 752 lb/ft @ 5300 with over 700 lb/ft from 4500 to 6500. The dyno run was done on 100 octane but this is/was a pump gas engine.

I'd call that a good day at the dyno shop.

That is very respectable,

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post #39 of 42 (permalink) Old Feb 23rd, 19, 2:46 PM
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Re: 555 What do you think?

Quote:
Originally Posted by backseat69 View Post
So a little update. I decided to bag the 555 plan entirely and build a nice little injected 427 for my car instead and make it more of a driver with OD Richmond etc. Puss'ed out so to say..

I did go ahead and put the 555 together and sold it to a guy down in Southern Oregon for his 64 Chevy former race car. He took it down to run it on the dyno to get broken in and tuned a bit. With no further tuning and a bolted on Pro systems 2 circuit dominator right out of the box he managed to pull down 863 HP @ 6600 RPM and 752 lb/ft @ 5300 with over 700 lb/ft from 4500 to 6500. The dyno run was done on 100 octane but this is/was a pump gas engine.

I'd call that a good day at the dyno shop.

Nice! we have a slightly milder 555 then yours with AFR 325s,1150 2 circuit,2 inch headers .

I do not have any dyno numbers only track times kinda similar HP to your dyno numbers .
when I used the wallace website calculator.
Your Horsepower computed from your vehicle weight of 3495 pounds and 117.87 MPH is
889 HP.
Your Flywheel HP is 853
computed from your vehicle weight of 3495 pounds and ET of 5.87 seconds.

mine is 10.7 compression with flattop pistons 135psi cranking compression well on 6 of them.

78 Camaro,3495,Driven to the track.
UD Harold hydraulic roller

REC90/112
1.27
5.87 @116.76
9.24 @141.64
vp 109
1.35
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post #40 of 42 (permalink) Old Feb 23rd, 19, 3:06 PM Thread Starter
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Mike
 
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Re: 555 What do you think?

Yeah. I figured thats a good high 9 combo with the right converter. I used to run a similar HP 68 cougar that was a 9.7 Car all day.
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post #41 of 42 (permalink) Old Feb 23rd, 19, 4:42 PM
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Gary
 
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Re: 555 What do you think?

i think you should have kept that bad boy and slid it in something
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post #42 of 42 (permalink) Old Feb 23rd, 19, 5:00 PM Thread Starter
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Mike
 
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Re: 555 What do you think?

Quote:
Originally Posted by gnicholson View Post
i think you should have kept that bad boy and slid it in something
The Camaro its in now I like to drive too much and couldnt relegate it to race car status. The injected 427 thats in it now is the most driveable engine Ive ever had so not tears there. The rest of the garage is taken up by a 69 Chevelle I'm building for a friend. If I had the space I'd be on it but I have the formula now in a year or so when the Chevelle is done I might have to do it again. That 555 did turn out pretty good.
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