You guys should all buy two. One as a worthwhile upgrade for your 907 engine, and one as a piece of sculpture for ...   11-29-2016 04:26 pm

Clinton, For an 8.4:1 compression 907, the cylinder pressures should be 110 - 130 psi cold, or 150 - 170 psi at full operating ...   11-28-2016 06:15 pm

Nice Work! I'm impressed. Tim ...   11-25-2016 04:41 pm

DonBurns wrote: In the Des Hammill book he says that for Dellortos the average turns for the idle mixture screws from closed is from 3 to ...   11-23-2016 01:12 am

qwerty wrote: Heyyy? Not sure we're on the same page here. See pic below.Brain fart, or brain not engaged. You're right. Later, Tim ...   11-22-2016 06:42 pm

qwerty wrote: I'm also thinking of lessening the eccentric offset of the 10mm hole by a few mm to allow for more control when tensioning, as ...   11-22-2016 04:58 pm

If I understand you correctly, what you need is a version of the Lotus eccentric hub with more shoulder and less spigot... correct? How about making ...   11-22-2016 02:25 pm

Pilkington is the original Triple-X manufacturer for many Britcar windshields. Top quality and a correct fit. ProSource is a US-based company that sells Chinese-sourced ...   11-19-2016 04:26 pm

Don, Lean mixture may cause the engine to run a little hot, but it shouldn't cause full blown over-heating. I suspect there's a cooling ...   11-14-2016 07:19 pm

Bfitz241 wrote: As to measuring the jets with pin gauges, I read somewhere that the numbers on the jet represent its size in MM...e.g. a 190 ...   11-14-2016 06:41 am

qwerty wrote: The third major difference 3) The bearing's bore: the ID on the 6005 bearings is 25mm whereas the ID on the SKF 414871A ...   11-13-2016 05:55 am

Frank, The Dellorto intake manifold is secured to the head with nine studs. The Zenith-Stromberg manifold uses six studs. All the heads ...   11-13-2016 02:49 am

DonBurns wrote: My engine is 2.2, 104 / 107 combination, 9.6 compression, Big Valves (West Coast Cylinder Head). The 45 Dellotos are as supplied by the ...   11-12-2016 10:00 pm

BTW... The cast iron tappets don't last forever, and I've been seeing a lot of cracked tappets in the last few years. If ...   11-12-2016 08:51 pm

Bfitz241 wrote: I haven't weighed the floats...however I do have a scale that can do that, nor have I checked float level...sounds easy enough to do. I ...   11-12-2016 08:45 pm

On a related subject. The auxiliary pulley abutts against a little wire circlip that is not very strong. The pulley can ...   11-12-2016 08:13 pm

And another view... ...   11-12-2016 08:03 pm

qwerty wrote: Would one of the kits pictured (Kemp High Performance engines) be a direct replacement? They advertise this as an upgrade from the S3 ...   11-12-2016 07:56 pm

NigelK wrote: In the meantime I'll annotate your original post with the jetting from Lotus 907 engine spec 1, which is more or less contemporaneous with ...   11-12-2016 03:16 am

qwerty wrote: Gaaahhh.. Replaced the belt and pulley today and although the old belt was tracking almost spot on center of the sprockets before the ...   11-11-2016 11:53 pm

Frank Schwartz wrote: I'll check with my local store and see if they have the blue belt.Call ahead. Even if corporate NAPA/ O'Reilly's lists ...   11-11-2016 11:11 pm

qwerty wrote: Is this arc to the outer hub normal or wear?It might be normal wear, but it was not apart of the original design or ...   11-11-2016 10:54 pm

qwerty wrote: As noted SKF also has this type of bearing.SKF is a quality brand, and normally my first choice for bearings. But I'm ...   11-11-2016 10:51 pm

Frank, The blue belt is from Gates Racing, a specialty division of Gates Rubber. Their part number T104RB. It's available from any ...   11-11-2016 10:42 pm

qwerty wrote: Tim can you remember the bolt thread off the top of your head and i'll look them up and compare them with the hex ...   11-11-2016 04:30 am

Thanks for posting about the BECO bearing. I've not heard of that one before, and I'll add it to my list. Regards, Tim Engel ...   11-11-2016 03:54 am

It shouldn't be necessary. If you don't have a specific issue that needs a bandaid, then avoid using Loctite on studs (or bolts) ...   11-10-2016 07:02 am

Brett Gibson JH5 20497 wrote: I am in the process of bolting things back onto my rebuilt engine, and in doing so when I looked into ...   11-09-2016 06:58 am

qwerty wrote: Button heads will clear easily although they are a fair bit weaker.As noted, button heads are weaker... I wouldn't use one. But ...   11-09-2016 06:19 am

Or, shown another way... ...   11-09-2016 06:13 am

Here is the page from the Lotus Esprit Turbo manual that talks about turning the eccentric tensioner counter-clockwise to tighten the timing belt. To get the ...   11-09-2016 06:09 am

Some Allen drive cap screw heads (cheese heads) are taller than others, and can rub on the back of the pulley. Choose the ...   11-08-2016 03:19 am

Screenplay wrote: I also have a question: My current project, #18341, has a timing belt that rides near the rear edge of all of the toothed ...   11-08-2016 02:32 am

Screenplay wrote: I, too, ran one for many miles in the wrong position as I was following the instructions in the WSM. Thanks to Tim's tip ...   11-08-2016 02:17 am

When tensioning the timing belt, rotate the eccentric counter clockwise (as viewed looking at the front of the engine). If the eccentric is ...   11-07-2016 05:46 am

Brett Gibson JH5 20497 wrote: I cut one up just to see how tuff they are with an "OLFA" Knife box cutter, takes a little time ...   11-01-2016 11:42 pm

qwerty wrote: Thickness of the Gates Blue T104RB excluding tooth height is averaging 2.35 - 2.40mm measuread at various points around the belt and on both ...   11-01-2016 11:32 pm

qwerty wrote: Tim are there any specs on the HTD belt (which i was looking for but can't find the crank pulley, otherwise i would have ...   10-15-2016 09:46 pm

qwerty wrote: You can also replace the standard belt with a gates racing belt for apparently 3x the life. Gates Part # T104RBThe Gates Racing blue timing ...   10-15-2016 06:12 am

Joenpate56 wrote: I am replacing the old belt as it is several years (10+) old.The black, trapezoidal tooth timing belt is supposed to be replaced every ...   10-14-2016 02:29 am