Does anyone make an improved lower intake for the Cosmo 13B_REW
#1
The General RE
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Does anyone make an improved lower intake for the Cosmo 13B_REW
I was just wondering if any has seen an aftermarket lower intake to replace the lower manifold of the Cosmo 13B-REW. The low profile nature of this intake looks to be bad for flow.
#2
Originally Posted by 13BT_RX3
I was just wondering if any has seen an aftermarket lower intake to replace the lower manifold of the Cosmo 13B-REW. The low profile nature of this intake looks to be bad for flow.
#5
You'll have to do a lot more than port matching to fit the upper RE intake to the GZ LIM. The ports on the RE intake are spaced too far out to actually have a good port match. The GZ LIM is lot better than the factory lower RE/REW LIM in both airflow cfm and equal flow between the front and rear ports not to mention having enough 'meat' on it to do some serious porting if the application requires it.
#7
Originally Posted by crispeed
You'll have to do a lot more than port matching to fit the upper RE intake to the GZ LIM. The ports on the RE intake are spaced too far out to actually have a good port match. The GZ LIM is lot better than the factory lower RE/REW LIM in both airflow cfm and equal flow between the front and rear ports not to mention having enough 'meat' on it to do some serious porting if the application requires it.
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#8
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He's talking about the Re UIM to FD or your own LIM. I have both in my garage, There is no way to fit an RE uim to an FD lim. To get good flow would take at least an inch and a half of spacer.
But them REW UIM's are easy to come by, put the word out that your looking for one on the for sale section you can probably get a TB, UIM and elbow for 100 dollars.
But them REW UIM's are easy to come by, put the word out that your looking for one on the for sale section you can probably get a TB, UIM and elbow for 100 dollars.
#9
The General RE
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Originally Posted by Blake
Well, I physically placed an FD gasket on an -RE motor here in the shop and it was practically perfect. The -RE secondary ports go a little bit lower, but the spacing is the same as far as I could tell. It should only require minor port matching.
Also, what is the dimmension from the engine mounting flange surface to the centerline of the runners. Will it offset the placement if the Throttlebody towards the exhaust?
#10
The General RE
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Originally Posted by slo
He's talking about the Re UIM to FD or your own LIM. I have both in my garage, There is no way to fit an RE uim to an FD lim. To get good flow would take at least an inch and a half of spacer.
But them REW UIM's are easy to come by, put the word out that your looking for one on the for sale section you can probably get a TB, UIM and elbow for 100 dollars.
But them REW UIM's are easy to come by, put the word out that your looking for one on the for sale section you can probably get a TB, UIM and elbow for 100 dollars.
#12
The General RE
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If the manifold weren't full height you could sell it with a spacer that people could play with.
Is there a nice flowing short intake with the same basic layout that would be easy to create an adapting spacer for?
Is there a nice flowing short intake with the same basic layout that would be easy to create an adapting spacer for?
#14
The General RE
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It would be even easier to leave it alone. I have no flow data to compare the manifolds so I can't make a decision to change yet. I don't feel comfortable with going to smaller primaries. Especially when the inlet ports are so big. Also, $600 is worth it for me to invest my time instead. For $600 I could probably make a custom manifold.
What is the best flowing EFI manifold around?
What is the best flowing EFI manifold around?
#15
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Originally Posted by Blake
The Xcessive Lower Intake for the 13B-REW FD will bolt on to a 13B-RE Cosmo. You would need to do some port matching, but it is otherwise a bolt-on. The Xcessive Lower Intake has larger runners than the FD manifold, is better balanced (the stock FD intake is very imbalanced) and allows you to run up to 4 secondary injectors. We sell the manifold for $520 plus shipping. You can use your stock fuel rail if you just want to run two secondary injectors and plug the other two fuel ports (plugs included). We also sell a 4 injector top-feed rail for $295.
-S-
#16
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My 2 cents; The Cosmo upper and lower manifolds flow better than the FD ones, runners are larger on the Cosmo. Motor will need to be ported to match openings on the Cosmo lower manifold. FD upper manifold will not fit on the Cosmo lower. FD throttle body will not fit on Cosmo upper manifold without a spacer/adapter. Greddy elbow will not fit on Cosmo throttle body. Conclusion: Get the entire Cosmo set up....Like I did
#17
The General RE
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Does any make a stubby lower intake for the turbo blocks like the RB delorto lower? Those have 4 runners inline. May need a bit of porting, but the upper connection to my cosmo intake would be a simple piece to make. While I am fabing the connecting adapter I could put in O'ring grooves and eliminate the need for gaskets.
#18
Originally Posted by Zero R
Blake this wont work, the holes for upper to lower don't match across the two motors or am I misunderstanding you???
-S-
-S-
The FD lower manifold is a problem mainly for balance and marginally for flow. The upper manifold does not appear to be a problem whatsoever in practice. Cosmo 13B-RE engines do have a lot of high-HP potential with those big runners, but the FD 13B-REW is no slouch either. For FDs, we think it's cheaper and easier to stick to the -REW block unless you are shooting for, say, 700+ rwhp. For FC, the -RE is a nice drop-in, but you don't have to stick with the Cosmo manifolds to get big numbers. Do remember that while the later Cosmo 13B-REs had windowed bearings, the gears are not as hard as the FDs, so you should swap them out if at all possible. The -RE is basically a Series 5 block; the -REW is more advanced and typically has stronger dowel bosses to boot.
#19
The General RE
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Would the bigger ports and runners of a Cosmo engine allow the motor to make the same power as the REW with the same port specs but with less boost? Would you need to port it more agressively to do this?
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