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#1
02-20-2018, 10:53 PM
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2nd gen chromoly crossmember
Is there anyone out there that makes a chromoly crossmember for a 1970 Firebird. I have a crossmember from Smith racecraft for 67-69 firebird that fits when I was running open headers. but after adding 3' exhaust, I had to go back to stock piece due to large tube size of racecraft crossmember not allowing exhaust clearance.
I thought it saved 7-10lbs |
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#2
02-21-2018, 07:48 PM
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G Force/Summit have ones that have a big U for the exhaust but not chrome moly and about 5-7 lbs heavier that the stock one.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#3
02-21-2018, 09:22 PM
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Trying to go lighter. Stock crossmember works, but chromoly is half weight. Can't believe not more options out there for bolt on pieces like this
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#4
02-22-2018, 07:38 PM
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I was going to a TH 400 in mine and got the Bowtie Overdrive-lighter than stock but straight no exhaust humps. Got the G force -heavy SOB looks like 1/4 steel! Used a factory TH350 I swapped the tab top the other side. Made a 2x4 Jig to weld it on with.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#5
02-22-2018, 08:13 PM
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Did you check Chris Alston’s Chassisworks?
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1969 Firebird, Tx3-455/468 machined by CVMS E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid 850DP on E-85 by Eric Niefert/T2 1" plastic spacer T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400 1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine) https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be 1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine) |
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#6
02-22-2018, 09:13 PM
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Quote:
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1966 GTO 1969 Lemans Convertible- F.A.S.T. legal family cruiser. 12.59 on G70-14 Polyglas tires. 1.78 60' 1969 Bonneville Safari- cross country family cruiser. . 1979 Trans Am 400, 4-speed, 4 wheel disc. View from the drivers seat racing down Atco Raceway- http://www.youtube.com/watch?v=GhYDMdOEC7A Ride along in the other lane-http://www.youtube.com/watch?v=mIzgpLtF_uw |
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#7
02-22-2018, 10:25 PM
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Thanks, I sent them email. They are tubular steel so not sure if much weight diff for price. Racecraft chromoly piece was super light, just bulky no room for exhaust
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#8
02-23-2018, 08:59 PM
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Fyi, chassisworks emailed me back - 15lbs w/ adapter and $300 w adapter. Stock only weighs 8.5lbs.
I guess I'll stick w stock piece |
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#9
02-23-2018, 10:05 PM
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deleted
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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