Chevelle Tech - View Profile: bracketchev1221

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Showing Visitor Messages 1 to 6 of 6
  1. Harris Roc Malouda
    Apr 19th, 20 5:44 AM - permalink
    Harris Roc Malouda
    Sorry i cant send messages, so i have to answer here:

    Thank you so much for the answer. I talked to Chris a bit, i want a cam that peaks at 7000rpm. So it will be in the 250s timing wise and 600+ Lift area.

    So even more than yours. I will also go for an air-gap since it will feed the "small" 402 enough to 7000. plus an 850 AED annular carb. With stock 781s 500+ hp should be possible..

    Thank you for explaining the dyno differences, i knew there must be something i forgot.. otherwise those numbers would never add up.
  2. Harris Roc Malouda
    Apr 17th, 20 8:38 AM - permalink
    Harris Roc Malouda
    So how can this 145hp gap be explained?

    - CR is 9.5:1 instead of 11:1, so maybe minus 15hp.

    still 130 hp difference. Is it ALL coming from the duration of the camshaft? 242 vs 224 ? Lift is even the same..

    What is your opinion?

    In the future i will ask chris straub for a full custom grind for my engine and do a full roller conversion. I wann it to peak at 7000rpm, redline at 7400. I think i will end in the 500+ hp range, just like you..

    PS: Sorry, somehow i am cant send you privat messages. You can delete these public posts and send me PN if preferred.
  3. Harris Roc Malouda
    Apr 17th, 20 8:37 AM - permalink
    Harris Roc Malouda
    -2) I found an articel about an engine very similar to mine:

    What i have (L78 original):
    402, 9.8CR with stock 781s and a Hyd. Fl. Tappet Magnum 270h Cam (In/Ex: [email protected] & 0.510 Lift). On top a non-rpm Performer 2-O Intake with 750 Edel Carb breathing into 2"into3.5" Hooker Headers.

    The car in the article is a 402, 9.5 CR with 820 Heads and same 270h Cam. Unkown Intake and Stock headers.

    Here is the article:
    -http://www.superchevy.com/how-to/engines-drivetrain/sucp-1110-402-big-block-cylinder-head-swap-head-games

    They say the TFS heads increased hp by 30, so 280 must have been the hp with 820 heads.

    Thats 145hp below what hotrod measured in this article with a full stock L78:

    -https://www.hotrod.com/articles/chevrolet-lied-stone-stock-1969-l78-396-big-block-makes-50-hp-more-than-factory-rating/

    So how can this 145hp gap be explained?
  4. Harris Roc Malouda
    Apr 17th, 20 8:35 AM - permalink
    Harris Roc Malouda
    Hi there,
    i saw a lot of posts from you and am very interested in your build, since it already resembles mine to a certain amount, but will become even more similar in the future.

    There are 2 reasons i contact you.

    1.) One is about details of your 408 Build.

    2.) Second is to ask you about your opinion, why the hp in a certain build is so low? I will explain what i mean.

    -1.1) What was the Peak rpm of your engine? 6500 or 6800?
    -1.2) And you used headers, right?
    -1.3) May i ask about your timing curve? intial/total @ what rpm?
  5. tucson67ss
    May 3rd, 16 4:19 PM - permalink
    tucson67ss
    Have you heard of my issue before do to a lack of vacuum ? Yes, I think your solution is the best as you won't have the contamination in the cylinders.
    I would assume they are on an angle(30 degrees)and NOT 90 degrees to the collector so exhaust flow would draw from the PCV line creating a vacuum ?
  6. lee williams
    Oct 4th, 15 7:58 PM - permalink
    lee williams
    Thanks for your input on my 396 head gaskets. If I can, I'd like to ask you some specific questions about the head gaskets:
    1. Would my best option be a gasket with the two irregular holes open on the ends of the gasket that are open?
    2. If my block has the three 1/2" holes at the bottom, should I punch/cut the head gaskets to expose these holes?
    3. Is the optimum gasket one that has the end holes and the three 1/2" holes all open and matched to the block?

  About Me

  • About bracketchev1221
    Location
    Lancaster, PA
    Currently own:
    1970 chevelle S/P S/G
    548 chevy, t-400 w/brake
    5500 conv 4.88 gears
    Photo Link
    http://www.dragtimes.com/1970-Chevrolet-Chevelle-Pictures-7479.html
  • Signature
    Ray

    Best pass 8.87 at 150.98 1.212 60'. Sold 3/2018

    1970 SS 396 project in progress. Bought 5/2018

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Mar 16th, 20
8:00 PM - 71496Chevelle mentioned bracketchev1221 in post Re: Help Me Design My Chevelle
bracketchev1221 That's what I am try...

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Jul 9th, 20
7:44 AM - bracketchev1221 quoted Ericnova72 in post Re: .005" backlash too tight?
That may fix the noise...but if...
Jul 2nd, 20
8:55 AM - DragRacer quoted bracketchev1221 in post Re: Radial Testing Tires Moving and
I would try new plugs first. I did ...
8:49 AM - JBoggs quoted bracketchev1221 in post Radial Testing Tires Moving and
I would try new plugs first. I did ...
Jun 30th, 20
7:16 PM - JBoggs quoted bracketchev1221 in post Radial Testing Tires Moving and
Drivers side about 2" a pass, passen...
2:25 PM - bracketchev1221 quoted JBoggs in post Re: Radial Testing Tires Moving and
Drivers side about 2" a pas...
9:20 AM - JBoggs quoted bracketchev1221 in post Radial Testing Tires Moving and
How far have the tires moved on the ...
Jun 23rd, 20
12:03 AM - GR8WHITE quoted bracketchev1221 in post Re: Flexplate Shield vs JW Ultra Bell
I also cut all the extra ears off th...
Jun 22nd, 20
2:16 PM - BillyGman quoted bracketchev1221 in post Re: Manifold thermostat orifice wall: what is this for???
To me to put/have that wall there fo...
2:13 PM - GR8WHITE quoted bracketchev1221 in post Re: Flexplate Shield vs JW Ultra Bell
I ran a 168 tooth flexplate and an U...
12:04 PM - bracketchev1221 quoted Tom Mobley in post Re: Manifold thermostat orifice wall: what is this for???
I think it's there to help with...
Jun 19th, 20
10:54 AM - B2Pracer quoted bracketchev1221 in post Re: ET Results From Carburetor Spacers
I think for the amount of hp a space...
8:38 AM - BillyGman quoted bracketchev1221 in post Re: Manifold Distributor counterbore angle???
What you are seeing is normal, the d...
Jun 18th, 20
12:47 PM - BillyGman quoted bracketchev1221 in post Re: Ever use a REAR bypass hose for cooling?
Ever see the 3rd hole in the water p...
9:25 AM - bracketchev1221 quoted BillyGman in post Re: Ever use a REAR bypass hose for cooling?
SBC engines never came in cars...
Jun 17th, 20
6:36 PM - Arch Stanton quoted bracketchev1221 in post Re: Heat wrap entire exhaust - Effects?
This is my thoughts. The wrap is no...
8:56 AM - bracketchev1221 quoted BillK in post Re: 4 bolt 400 SBC
I must be getting old, I t...
8:47 AM - BillK quoted bracketchev1221 in post Re: 4 bolt 400 SBC
Doesn't appear either is a virgin bl...
8:40 AM - bracketchev1221 quoted Aaron in post Re: 4 bolt 400 SBC
Here are some pics of my m...
8:12 AM - bracketchev1221 quoted Arch Stanton in post Re: Heat wrap entire exhaust - Effects?
I did this on my Hayabusa years a...
Jun 15th, 20
7:36 AM - BillyGman quoted bracketchev1221 in post Re: baby blower advance question.
I ran mine without it hooked up. Be...
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