Wittek #10 clamp

[John M.]

I know the wittek #10 396 427 454 bypass clamp was used from 1965-1972, I have seen many known examples, what about the 1973-4 454, the bypass hose is the same I assume the clamp is to.
Some of the parts sellers (DR Rebuild as a example) sell the wittek #39 for 1965-1974 BB, (I have seen that clamp used on 70s ford smog systems) I assume this is a good replacment for the #10 wittek clamp...............is it common for the #10 clamps not to tighten down far enough using a repo bypass hose..........................Thanks in advance John

[John M.]

Re: Wittek #10 clamp

Someone should know or confirm what I think......................Thanks John

[John M.]

Re: Wittek #10 clamp

Help!! Help!! Help!!

[Ronald L.]

Re: Wittek #10 clamp

John, Send me a pair and I'll confirm.

[John M.]

Re: Wittek #10 clamp

Im thinking of a number between 1-10 if you can guess it I will give you a pair.......Thanks JOHN

[Ronald L.]

Re: Wittek #10 clamp

John, To answer a question with a question...when you say '72 (65-72) do you mean model year '72? That being the part actually could have been there in December '71? The rest of my data is at home so to provide the exact details will need to wait until tonight.

Now the interesting thing is I have a couple of reference pictures of C2 BB's that I was looking at yesterday for exhaust locks, gaskets, and related details, most of which seem to get over looked, at least on the 390 HP that some let reside in the shadows of a 425HP of the same year, but in that set of pics, was an interesting discovery, alligator skin

Why are so many top flight C2 BB's missing the exhaust manifold French locks???

[Dale C.]

Re: Wittek #10 clamp

John
Is this for 72 and up cars that # 10s may not fit?
Dale

[D S.]

Re: Wittek #10 clamp

John, for whatever reason(s) people seem to think that the #39 Wittek clamps are correct for the by-pass hoses on big block Corvettes. I was told right here on the TDB that #10 Witteks are correct. The #39s are too large. I have a set of #10s on my '70 LS-5.

[Ronald L.]

Re: Wittek #10 clamp

This entire issue has to do with the thickness of the original rubber versus the change released in MY72 with backward application to the earlier BB models. The wall stock of the hose was thinned out.

I'll bet (don't yet have a set of #10's) that they fit perfect on the original design intent hose. What the repro houses sell is horrible, they barely close on the too-thin hose as it is.

Not to worry - correct thickness hoses are soon to be a reality, word is only a couple of weeks away and I am now counting 4 originals I have seen all with alligator skin

[John M.]

Re: Wittek #10 clamp

Ron send me your address and I will send you a pair of NOS #10 clamps, you can put on that thick Gator skin bypass hose , I think that all 1965-1974 396 427 454 corvettes use the #10 clamp..........any problems I have seen has been the thin repo bypass hose, the #39 was never used for that application as far as I know, I have seen it on fords..........Thanks JOHN

[D S.]

Re: Wittek #10 clamp

Ron send me your address and I will send you a pair of NOS #10 clamps, you can put on that thick Gator skin bypass hose , I think that all 1965-1974 396 427 454 corvettes use the #10 clamp..........any problems I have seen has been the thin repo bypass hose, the #39 was never used for that application as far as I know, I have seen it on fords..........Thanks JOHN

John, can you post photos here of your NOS ones and any used ones? What finish is on the NOS ones? I understand that the #10s were used on other vehicles as well. A salvage yard junkie tells me has found them on older buses.

Thanks,
Scott Sims
Texas Chapter

[Ronald L.]

Re: Wittek #10 clamp

Thanks John, Details sent.

[Richard M.]

Re: Wittek #10 clamp

FYI this thread from a while ago has some other info too........Rich

427 Bypass Hose leaks...

[D S.]

Re: Wittek #10 clamp

I have a friend in Oklahoma who has some sets of original Wittek #10 hose clamps, if anyone is interested. The 10 is very distinct but some of the wording isn't.

Scott Sims
Texas Chapter

[John M.]

Re: Wittek #10 clamp

How much are the used #10 clamps..Thanks JOHN