Ask an Engineer

[ducatilover]

Been there done that... made a GSXR750 think it was a twin...
for one of my TQ midgets...
Cut the cams turn one end 180* re-weld back togeather..
change the plug leads..
just don't try to rev it it 11,000 rpm... set the red line about 7500/8000
and make use of the massive torque it will gain..

Gavin Sendle/Craig Webby won the NZ speedway side car champs with a
GSXR1100 running as a twin..

That's a proper big bang though, this is only a half arse one


I have a set of ZZR400k cams in the garage, same journals as the 600 ones and same dimensions, except lobe height.
I could experiment with them?
They're not hollow, just have indents in each end for the magic cam making machine or some shit

[Flip]

Coppercoat is IMHO the best thread lubricant to stop exhaust threads binding up. In the old days they used to use brass nuts on exhausts.

[imdying]

The why is easy; they came with an engine. I have some long brass manifold nuts I thought I might try.

Drills Taps and Dies have LH twist drill bits.

[carburator]

The why is easy; they came with an engine. I have some long brass manifold nuts I thought I might try.

Drills Taps and Dies have LH twist drill bits.

Umm, in the years Ive been doing it, never seen taps come with a LH drills
as for Die's you don't need to drill a hole for them...

[Ixion]

Umm, in the years Ive been doing it, never seen taps come with a LH drills
as for Die's you don't need to drill a hole for them...

He means the company "Drills Taps and Dies Ltd" in Christchurch. These dudes.

And they do indeed list LH jobber drills. Available online no less! Location on the site is a bit obscure bt the link takes you straight there.

[imdying]

Umm, in the years Ive been doing it, never seen taps come with a LH drills
as for Die's you don't need to drill a hole for them...

Never said they did!

[Ocean1]

The why is easy; they came with an engine. I have some long brass manifold nuts I thought I might try.

Wasn't trying to imply that Mr Honda (et al) don't know their shit, it's just that I've see Ti fail so many times in new applications. It seems to behave quite differently to "normal" materials, and the failure mode and frequency is very difficult to predict. Brass nuts should be fine as long as you've got enough extra length. If you want AB2 nuts let me know, I've got some round bar stock here.

Drills Taps and Dies have LH twist drill bits.

Cheers, looks like a fairly good selection too if they actually stock what they've got listed. When I'm feeling braver I'll ask them about prices.

[carburator]

Never said they did!

Ah, Id better go and shoot a crow, bast and slow roast it so I can eat humble crow..

did'nt realise you mean't a company..

[HenryDorsetCase]

Ah, Id better go and shoot a crow, bast and slow roast it so I can eat humble crow..

did'nt realise you mean't a company..

At last I can contribute! First slow cook it like you would lamb shanks*: so get the crow in a pot and put in onion, carrot, celery, bay leaf, beef stock and red wine, some herbs and whatnot, and cook it for a few hours till tender. reserve the liquid, and put the crow in the fridge overnight. When you want to serve it, roast it uncovered for 45mins or an hour till the skin is crispy. Meanwhile, get the fat off your cooking liquid and reduce it till syrupy. Serve with new potatoes and seasonal veges, sauce over the top and more on the side.



*This works a treat for duck so should work with most game birds.

[imdying]

Wasn't trying to imply that Mr Honda (et al) don't know their shit, it's just that I've see Ti fail so many times in new applications. It seems to behave quite differently to "normal" materials, and the failure mode and frequency is very difficult to predict. Brass nuts should be fine as long as you've got enough extra length. If you want AB2 nuts let me know, I've got some round bar stock here..

They're not factory, they just came with a 'race' motor I purchased... I know the previous owner has had a couple of them with a bit of Ti hardware all over them, so presumably they're reasonable adequate. It's only for the track, so not the end of the world if one breaks Yup, nice long manifold nuts like you'd see on much older vehicles, I'll see how they go with some Coppaslip or similar. The way I figure it, even if they're not really suitable, they'll be soft enough to remove without too much hassle?

[Ocean1]

The way I figure it, even if they're not really suitable, they'll be soft enough to remove without too much hassle?

The nuts? Yes, worst case clean up the studs with a dienut.

[sootie]

Been there done that... made a GSXR750 think it was a twin...
for one of my TQ midgets...
Cut the cams turn one end 180* re-weld back togeather..
change the plug leads..
just don't try to rev it it 11,000 rpm... set the red line about 7500/8000
and make use of the massive torque it will gain..

I can understand limiting the revs with the engine firing more unbalanced, but do you really gain torque??
I would have thought the road grip on dirt or gravel might improve, but why does engine torque change (if this was what you meant) ?

[Grumph]

I can understand limiting the revs with the engine firing more unbalanced, but do you really gain torque??
I would have thought the road grip on dirt or gravel might improve, but why does engine torque change (if this was what you meant) ?

Total torque per engine firing cycle doesn't change but instead of getting it in four small lumps at pretty even intervals, it comes in two big lumps spaced further apart....technically, peak torque values seen at the clutch and gearbox are doubled....

Which is why I said earlier i wouldn't give much for the cush drive in the Kawa clutch's chances of survival...they don't have a good reputation as standard.

i'm curious about the GSXR though -I've built a lot of TQ GSXR's and wonder what the limiting factor was. I'd assume diff drive cos a std box would not take it. Mains cutting out with shaft flex ? That is a low rev limit....

[pete-blen]

Total torque per engine firing cycle doesn't change but instead of getting it in four small lumps at pretty even intervals, it comes in two big lumps spaced further apart....technically, peak torque values seen at the clutch and gearbox are doubled....

Which is why I said earlier i wouldn't give much for the cush drive in the Kawa clutch's chances of survival...they don't have a good reputation as standard.

i'm curious about the GSXR though -I've built a lot of TQ GSXR's and wonder what the limiting factor was. I'd assume diff drive cos a std box would not take it. Mains cutting out with shaft flex ? That is a low rev limit....

No it was a chain drive car... but as you will know the GSXR750 had a weak 2nd gear when used as the main drive gear...
We use to put GS1000 gears in... had to cut a new cerclip groove in the shaft... then remove the other GSXR gears so
you only had in gear / out of gear..

[carburator]

At last I can contribute! First slow cook it like you would lamb shanks*: so get the crow in a pot and put in onion, carrot, celery, bay leaf, beef stock and red wine, some herbs and whatnot, and cook it for a few hours till tender. reserve the liquid, and put the crow in the fridge overnight. When you want to serve it, roast it uncovered for 45mins or an hour till the skin is crispy. Meanwhile, get the fat off your cooking liquid and reduce it till syrupy. Serve with new potatoes and seasonal veges, sauce over the top and more on the side.



*This works a treat for duck so should work with most game birds.

have to find the photos of the ravens.. more meat than a crow..