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post #16 of 82 (permalink) Old Feb 10th, 19, 3:28 PM
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Dan Vasic
 
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Re: Boosted Beaumont Build

I like it :-)

This will be a fun Chevelle.
When you have the time post more pics of the car....the patina and the interior.

Dan

Owner of..... The 1969 SS396 300 Deluxe Post Sedan Registry
1969 300 Deluxe Post Sedan Frost Green
1969 SS396 300 Deluxe Post Sedan Lemans Blue (Sold to "69 Post Sedan")
1972 SS 502 T400 410 posi Mohave Gold
1970 Buick Skylark Post Sedan Gulfstream Blue
1970 Buick Skylark Post Sedan Burnished Saddle

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post #17 of 82 (permalink) Old Feb 10th, 19, 5:01 PM
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Levon
 
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Re: Boosted Beaumont Build

Good choice of beer's.
Chris27 likes this.

Levon Hovagimian
Team Chevelle #279
2015 Camaro ZL1 Summit White (Bone Stock)
70 Chevelle SS 454 LS5 4 speed. SOLD
Current Engine VortecPro 460 (513 HP) Original is resting
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1966 427 Corvette SOLD
1973 Camaro IHRA Hot Rod (LS-6 Auto)11.00 @121 (Chased a 10.99 or better) SOLD

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post #18 of 82 (permalink) Old Mar 1st, 19, 2:02 PM Thread Starter
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Chris
 
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Well finished up the hot side of the wastegate. A 60mm wastegate is massive, but it fits. Hopefully I can get the vacuum pump beside the wastegate and water pump.

As well on the crossover I changed the expansion join from a 4” to a 6”. I was always told run the biggest one year u can fit and since I have the room. I will run the smaller 4” expansion joint for the wastegate to downpipe cold side.

Little slow on progress with all the welding required but it’s coming together.

Going to move on the check valve spring pressures, oil pan modifications, and manifold change.
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
 
post #19 of 82 (permalink) Old Mar 1st, 19, 3:17 PM
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Chris
 
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Re: Boosted Beaumont Build

Looking good. You should bring that beast to Mission for some sea level drag action. The "Old Time Drags" is always a good time. Everything is 1972 and older. And as others have mentioned, excellent choice in beers. Still one of my favorites.

1969 Beaumont
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1977 Bronco
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The rest are boring responsible adult vehicles not worth mentioning.
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post #20 of 82 (permalink) Old Mar 2nd, 19, 11:09 PM Thread Starter
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Chris
 
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Well a Drag Week friend and local-ish guy in the area helped me out huge today with my clutch. Mayby some seen a post of a Mcleod street extreme that got hurt last year, as a result I was in need of a upgrade. So in some quick talks I got a used Mcleod twin disk RXT 1200. I will get further into details about flywheel weights and what not a little later as well what I have learned. Pretty stoked about it, I was original going to use a LSA/LT1 dual disk I have kicking around but this route will save a ton of time. I may still go that route down the road but let’s see how this works first.
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
post #21 of 82 (permalink) Old Mar 3rd, 19, 7:47 AM
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Gene
 
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Re: Boosted Beaumont Build

curious about flywheel weight etc....!

Gene
ACES 3112/Team Chevelle Gold #62
Be big, be a 'builder'!
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post #22 of 82 (permalink) Old Mar 6th, 19, 8:40 PM Thread Starter
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Chris
 
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Well here’s the manifold I am running for starters. It will be a edelbrock super victor with a 4500-4150 adapter. This should be the best ‘all out’ manifold. I have read a lot where people of a similar 502 build say they gain a lot over dual planes, so I will give it a try. I have welded in a -12AN o-ring port for the vacuum pump. This will also be where I will mount the vacuum regulator. I tried in the valve covers for drag week with poor results. It was constantly sucking oil out. Mounting it here has the least amount of oil splash with the valley tray in place. I also did a minor port job to eliminate the valley dam at the plenum to port that plagues these things. Should help with flow and fuel distribution a minor amount.

I am think in the future I may swap to a dual plane or modify this super victor so that I can fit everything under a stock hood. Mayby even one of those crappy edelbrock torquer 2-R twisted intakes. For now it will be the cowl!

As for those that say you can’t run a vacuum pump on the street, I will say after running one I wouldn’t go without it. Oil was instensely clean and the pump itself has basically no wear after 1800 street miles.
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
post #23 of 82 (permalink) Old Mar 13th, 19, 4:38 PM Thread Starter
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Chris
 
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So after some thinking I re-made the steering shaft. It was really close to the rag joint and did not want to risk melting or burning it while driving. Went with all Borgenson hardware to complete the task. I will say these are really nice pieces. The fit onto the splines is a lot better as well there is a lot more spline contact. The lower joint is a standard u-joint with no isolation to maximize clearenece and the upper one is a isolating one. I also picked up a crush style steering shaft. Surprising this new one will collapse 1” more than the old one.
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
post #24 of 82 (permalink) Old Mar 16th, 19, 1:02 PM Thread Starter
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Chris
 
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Here is a comparison to the two manifolds. Last year I ran the edelbrock C-454 with a dominator, this year will be a edelbrock super victor with 4150-4500 adaptor. In there base form the super victor is 1.25” higher than a c-454. Ports are the same size between the two. Once the adapter is in place it will make it 3.00” higher than last years setup

As well here is a couple pictures on a valve spring tester on the head, check the seat pressure and in this case I can check open pressure. Anyone with hydraulic lifters be aware the lifter can ‘pump up’ giving a faulty reading. Read it right the first time or back the rockers off to zero lash and check them. Good thing for me these PAC racing springs are within 10lbs of seat pressure. Well under 10% difference between them all.
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
post #25 of 82 (permalink) Old Mar 16th, 19, 9:16 PM Thread Starter
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Chris
 
Join Date: Apr 2010
Location: Calgary, Alberta, Canada
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Quote:
Originally Posted by 427L88 View Post
curious about flywheel weight etc....!
so I have been keeping track of clutch setups I have run in the past and current. see below for stats


McLeod Street Extreme (Drag Week Setup)
Pressure plate 20lbs
Clutch disc 5lbs
Aluminum flywheel 14lbs 8oz
Clamp load 2400lbs +/- 5%

Centerforce II
Pressure plate 25lbs
Clutch disc 4lbs 6oz
GM nodular Iron 31lbs 2oz
Clamp load 2800-3200lbs


Mcleod RXT 1200
Pressure Plate 12.25lbs
Clutch Discs 3.17lbs X 2 = 6.34lbs
Steel Flywheel 29.43lbs
Adapter Plate/Mid Ring 5.86


My first setup was the center force II and the entire assembly weight 56lbs, this resulted in the easiest to drive. My second setup was the Street Extreme at 35lbs, little harder to drive, way quicker RPM, not the greatest at the strip. The new setup will be a RXT with a steel flywheel at 47lbs. I'd expect this to be a great middle ground, well see how well it works at the track.


I will honestly say for a real street car despite the power levels and your into the drag strip, you will need a steel flywheel. Getting a 4000lb race weight car to leave the line half decent requires some stored energy. And after talking with fellow racers it seems the trend currently is to run big flywheels and small clutch setups, it seems to yield a great medium in leaving the line and accelerating your car.
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
post #26 of 82 (permalink) Old Mar 16th, 19, 9:54 PM
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Chris
 
Join Date: Aug 2002
Location: Alberta, Canada
Posts: 5,946
Re: Boosted Beaumont Build

Also remember your twin disc is only 9.688" which brings the weight closer to the center line, thus less inertia.

My old setup was:

Centerforce Dual Friction - 30.2 lbs
GM cast iron Flywheel - 26.5 lbs
Total - 56.7 lbs

Very easy to drive around and get off from stop lights. Could even launch in 3rd gear.

New setup:

McLeod lightweight billet FW - 24.8 lbs
McLeod RXT twin disc - 23.8 lbs
Total - 48.6 lbs

I get chatter with this clutch which requires more rpm to get it moving. Note, this is a ceramic disc. I don't notice any real difference in accel or decel.

Note: I have a T56 Magnum 2.66 gear and a 3.31 rear gear.

1971 Chevelle SS454, T56 Magnum 6 speed, 3.31 Posi

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post #27 of 82 (permalink) Old Mar 19th, 19, 11:30 PM
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Nice work it's coming along! Can't wait to see some video of it running and getting down the track!

Good job!
ak
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post #28 of 82 (permalink) Old Mar 27th, 19, 12:41 AM Thread Starter
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Chris
 
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Heres a little mock photo of the intercooler. It measures 24”x12”x4” core. Thinking I could fit a 27” wide but may settle for this one. Had to cheat to get it in and cut the rad support a bit to fit the charge tubes. So far to date this is the only cuttingnon the car. Was really hoping not to do this, but my mount under the rad support idea just didn’t look effective. This intercooler has to weight as much as the radiator. Should work good and support 1000hp. 3” charge coming in, 3.5” charge going to the engine. Hopefully this does not effect cooling drastically or at least when cruising at 85mph!
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
post #29 of 82 (permalink) Old Mar 27th, 19, 12:46 AM
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Chris
 
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Re: Boosted Beaumont Build

dang that's a tight fit. I'd be more worried about cooling at idle than while at highway speeds.

1971 Chevelle SS454, T56 Magnum 6 speed, 3.31 Posi

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post #30 of 82 (permalink) Old Apr 1st, 19, 7:50 PM Thread Starter
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Chris
 
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So I finally got the transmission back installed after the new clutch conversion. With that said I thought I’d show my throwout bearing setup. It is rather simple. A super t-10 snout bolted to the front with a howe racing throwout bearing. I have been running this with great success. I didn’t want to run the stock one as they are prone to failure unless you do the monster clutch mod.

I attached a couple pictures of the lift system I use, for those that jack there car up on blocks and don’t have access to a hoist.

As well I changed from headers bolts to header studs. The new fabricated zoomie manifolds allow you to pull them off with studs.

Also got some new lights in this year on the Low beams. They use H4 bulbs, picked them up at summit racing for $18ea. New vs old picture.
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is offline  
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