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#21
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I have not had a heat saturation issues. My engine is built to a stock 400 HO engine except my compression was lowered to handle 93 oct fuel. The timing is set to specs.
No issues at all with starter even driving about high 80's heat. My compression was lowered to handle 93 oct fuel. I have stock starter, stock heat shield and Long branch. I hear of people having issues. I thought it my be to a bigger cam and higher timing causing the hot start issue.
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68 400 HO 4sp Convertible Firebird400HO.com My 68 firebird 400 HO convertible Restoration Gallery |
#22
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Guys thanks for all the tips and info.
Though my car is just a cruiser this is Something that has been on my to do list Since I bought her 15 years ago. Glad to see no starter issues with a factory Starter and proper heat shields. I have not Had the starter issue since I had mine rebuilt With high temp solenoid spring and double layered heat shield. Timing is on point and well matched to fuel curve from My Q-jet. Hoping to place my order beginning of the week and have A fun fall project. Now just have to decide on ceramic or paint for the finish. Thanks again Gerry
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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
#23
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I had some battery cables made with larger gauge wire. It eliminated the hot start issues.
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#24
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Silverbullet your comment about the hot 80 degree weather gave me a good chuckle, as today was the first day we've had under 100. I haven't had any heatsoak issues with any of my cars and I drove my 68 and 69 to work last week at around 114.
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#25
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Ya, once it gets in the 90's here, it is miserable. We have so much humidity you step outside your soaked. terrible,. I hear AZ heat is dry and nice. If you are in a coupe with no air I praise you. I don't think I could do it. I ride with my top down and 90's is just to much.
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68 400 HO 4sp Convertible Firebird400HO.com My 68 firebird 400 HO convertible Restoration Gallery |
#26
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John H.. (North) of these forums tells me that he has great success rubbing motor oil into the LBM for a couple of days before install. Once up start up they will smoke like mad for a bit as the excess burns off but the oil keeps the LBMs from rusting for quite some time (years)
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'69 Bonneville convertible Warwick blue/ parchment interior 53 option accessories 2 more to go :-) |
#27
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Quote:
I am extremely pleased with the quality of RARE's products and impressed with their service and communication. Here is a link to a thread I started a while back when I first considered biting the bullet on a set of Long Branch manifolds. http://forums.maxperformanceinc.com/...d.php?t=737036
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1965 2+2 Convertible 421 HO 4-spd 3x2 8 Lugs 1968 GTO Convertible 400 AC Bench Seat Column Shift - Sold |
#28
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Quote:
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#29
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Manifolds
Well I spoke with Paul this morning and kit was ordered.
He is out stock on one casting all else was in stock ready to go. That is fine for me as this will be a Fall project. Thanks for all the feed back. Now what was the part number for the POR15 coating you guys used?? Gerry
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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
#30
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I've had mine on for four years and ordered from Ram Air Restorations. Great company to deal with. As far as starter problems, I installed a heat shield to provide some protection from the exhaust manifold temps. That being said, I was out a few weeks ago to a cruise night and my Bird wouldn't start when I went to leave. Last year it happened once before. Heat soak? Maybe. It was in the 90s that day. Anyway I am thinking of changing out the starter to a high torque mini one if it happens again.
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#31
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I had heat soak bad. Some put big cable on the battery some just go with mini starters and some do both. The more power you make and more cubes you run the more heat you make.
I was able to keep the stock small battery cable and just go with a RobbMc ministarter. |
#32
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Unlike the Abody HO manifolds the long branch don't shroud the solenoid so it isn't better or worse than the stock log manifolds in terms of heat soak. Starter change requires fully loosening the manifold to head bolts.
I've had good luck with simply rubbing motor oil on the manifolds with a rag a few times before installation, smokes for a few minutes but after you are left with a nice natural dark cast iron color that will never rust the way we use these cars today, being free is nice too!
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My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
#33
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What temp thermostat
I am running a NOS Delco thermostat and my car runs right at 180.
What temp stat are you guys running, I only ask cause I am concerned About hot starts once I get LBM's installed over winter. current starter has been in for 15 years. It has the High torque motor and high temp solenoid with hi temp spring. I also installed the double layer heat shield and have had no Issues with heat. Just thinking ahead. Gerry
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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
#34
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Would like to talk with you about setting timing - I have had a problem.
Jim 209-601-4408 |
#35
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Long branch
My fall/winter project has arrived.
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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
#36
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Engine art! Almost a shame to tuck them under the engine
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#37
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I have the RARE Repro LB's as well. I purchased them with the gray ceramic coating and within a couple of years they were covered in rust. I then had them blasted and painted them with the POR-15 Heat Resistant Paint - Manifold Gray. They turned out great and look the same after 2 plus years. That being said, my engine has had numerous issues so I only have about 15 miles on the manifolds, fwiw.
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
#38
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Long branch manifolds
Installed and they sound as good as they look.
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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
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