Need help building 1641 engine.

[bugcouple68]

I am just about to start re-building my bay engine, i have a 1300tp engine spare and wanted to know if it would be ok to fit 1641 B&P, eagle w100 cam and twin carbs?
Is there anything else i can do to get a-little more power out of it?
Was thinking of rockers etc? will i need to up rate them?
Any more advice would be appreciated as this is the first re-build i will have done!

 

[Vinco]

As you prob already know, you will need 1600 heads also.

I wouldnt personally go for 1641, ive heard many people say that for a bus its best to stick with the 1600 B&P's due to the thickest of the walls - more heat. Pay for some good quality 1600 Mahle ones.

This aside ive read about a few people running 1641's in buses no probs......your decision i guess prob worth going for full flow oil cooling if you do i reckon.

As for cam, im pretty sure the W110 is a better option for a bus, slightly lower end torque.

Rockers 1.25 rockers would team up well with a mild cam, stick to a 100 or 110 and you can use your standard push rods.

Whats the condition of the bottom end of the block you have? end float etc?

 

[gvee]

I asked about cams when rebuilding my 1641. The thread is here: http://forum.earlybay.com/viewtopic.php?f=4&t=35703" onclick="window.open(this.href);return false;
Hope it helps!

 

[K@rlos]

If your gonna strip that engine right down it would be worth going 1776 tbh, bit more guff and thicker walled cylinders.

 

[yachty]

When my piston rings started blowing, I bolted a set of 1641 B&P's to the stock 1500 SP bottom end, added a pair of DP 1600 heads I had lying around and topped it off with a pair of 36 dells suitably jetted. Didn't even break the case to check anything!

I converted to dog house cooling and fitted genuine cylinder tinware (with type 3 cool tins instead of the stock lower stuff) and it runs great. Maybe a bit hotter than normal after a hard motorway run but you can still hold the dipstick comfortably

Someone will probably tell me I broke a zillion rules of engine building doing this but its still going 2 years later. Hopefully well enough to get me from Cornwall to Sandown next week and then back down to Mallorca the week after :msn4:

edit: oops, thats in my 65 crewcab btw, not my westy. The westy has a 1776 with type 4 oil cooling and that runs cool aswell