Stevo Posted October 3, 2006 Report Posted October 3, 2006 Curious. What models of W's would have 'Stock' tubular steel manifolds? Turbo optioned 3.1's? I was under the assumption that all W's were stock cast iron manifolds. I checked my parts pamphlet and this was the listing for a front pipe or intermediate pipe. Quote
Robby1870 Posted October 3, 2006 Report Posted October 3, 2006 Weren't they on very few '88's and '89's? Quote
Brian P Posted October 3, 2006 Report Posted October 3, 2006 early '88s basically built in '87 as far as w-bodies go. Quote
BIGBULS Posted October 3, 2006 Report Posted October 3, 2006 Also Regals with the 3800..............their front manifold is tubular steel and the rear is cast iron. Quote
Stevo Posted October 3, 2006 Author Report Posted October 3, 2006 Thats pretty interesting though since my car is a first run 88' and I have cast front and back. I wonder why they did that. Quote
Brian P Posted October 3, 2006 Report Posted October 3, 2006 what is your build date? Most '88s I see have the cast iron manifolds, but I did see a few with the steel manifolds, mainly GP's with a build date of late '87. Quote
Stevo Posted October 3, 2006 Author Report Posted October 3, 2006 Mid 87' I believe. It's been a while since I have looked over on-body info for the SL. Quote
GutlessSupreme Posted October 4, 2006 Report Posted October 4, 2006 Curious. What models of W's would have 'Stock' tubular steel manifolds? Turbo optioned 3.1's? I was under the assumption that all W's were stock cast iron manifolds. I checked my parts pamphlet and this was the listing for a front pipe or intermediate pipe. TGP manifolds were also cast, not steel. Quote
5speedz34 Posted October 4, 2006 Report Posted October 4, 2006 Is there any advantages over steel vs. cast iron? Quote
Stevo Posted October 4, 2006 Author Report Posted October 4, 2006 I think the difference is weight and heat dissipation. Cast iron tends to have a higher density than cold rolled and welded steel. I think steel has the greater chance of being dimensionally unstable and either warping to cause leaks or fail due to corrosion . I just went through a 95' Hanes manual which shows at the time all the available engines and I found 3800's with Tube Steel Manifolds. I'm again gonna go out on a limb and say that cast iron manifolds are cheaper as well since the process has less handcraft than the welded tube steel manifold. Although castings can have the disadvantage of imperfections... can anyone back this assumption? Quote
Robby1870 Posted October 4, 2006 Report Posted October 4, 2006 Cast iron manifolds have to be cheaper. Consider how many they made and they only had to make one mold for the sand cast. Quote
GP1138 Posted October 6, 2006 Report Posted October 6, 2006 Did the Q4 get tubular steel? I seem to remember some GP's and Cuttys coming with the Q4. Quote
1990lumina Posted October 6, 2006 Report Posted October 6, 2006 Or the 2.2L or 2.5L in Lumina lol??? Quote
GutlessSupreme Posted October 6, 2006 Report Posted October 6, 2006 Did the Q4 get tubular steel? I seem to remember some GP's and Cuttys coming with the Q4. I think so.. Quote
99RegalGS Posted October 6, 2006 Report Posted October 6, 2006 Also Regals with the 3800..............their front manifold is tubular steel and the rear is cast iron. 3800's depends on the series. Series 1 have full tubular exhaust manifolds. The series 2 have the tubular rear and cast front. Quote
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