Rebuilding a Sprint Engine...Any tricks I should know?

[georgiasprint]

Gentlemen:

I have been an avid Triumph driver for 20 years. My daily driver list has incuded a TR250, Herald, 2000 Saloon, Herald, and TR4. Now that I have the Sprint and a new type of engine to rebuild, I am wondering if there are any tricks or tips the group could offer. I am seeking a car that is streetable...not an unreliable beast! I appreciate any insight you wish to share.

Best regards,

Joe Earnest

[dailysprinter]

Depends on how much money you want to spend, you should be able to get 160- 170BHP and reliabilty if done right. At the end of the day the more BHP the more engine trouble.

[iandollysprint]

Gentlemen:

I have been an avid Triumph driver for 20 years. My daily driver list has incuded a TR250, Herald, 2000 Saloon, Herald, and TR4. Now that I have the Sprint and a new type of engine to rebuild, I am wondering if there are any tricks or tips the group could offer. I am seeking a car that is streetable...not an unreliable beast! I appreciate any insight you wish to share.

Best regards,

Joe Earnest

Join the club. I purchased a near mint sprint in the Summer with a view to uprating slightly.
Got a full set of Poly bushes from the misses for Christmas which is a great start. I also have a pair of 2 inch SU's from a club member which have polished up nicely.

My plan for the car is as follows

Polybush everywhere. AVO fully adjustable dampers (height and rate). Uprated springs but nothing too hard, thinking 250lb fronts, 150lb rears. Sprintparts brake conversion. Alloy steering mounts. Electric cooling fan and possibly aluminium bespoke radiator.

Engine wise:- (might rebuild but compression readings are 160 psi for all four cylinders and car does pull well at present to redline and has only 63k miles with a FULL SERVICE HISTORY!.)

Those 2 inch SU's - they are just so simple.
Reamed out inlet manifold from Jigsaw (£175 quote)
Fast Road cam again from jigsaw - £275 from billet, not a regrind.
2 inch sports exhaust (I already have this partly from Rimmers partly from ebay)
I'll keep the original cold air intake system - none of those K&N pancake jobbies.
This should liberate around 150bhp I'm hoping

If I rebuild the engine then it will have a head job to match to inlet manifold and open the inlets up a bit for added air flow. 160+ bhp?

I am staying clear of Webers as they are just too expensive.

Total cost for the above (exluding engine rebuild) will be approaching £2k.
With rebuild add at least another 1-1.5k.

Should be ready in April if I do not do the engine rebuild. I may buy a separate engine to rebuild and enjoy the sprint this coming summer and rebuild the spare engine as time allows this year. I am also going to track a heavily modified 1986 BMW M635csi which I have built up over the last 7 years so I have to balance time and money carefully.

Ian

[iandollysprint]

Depends on how much money you want to spend, you should be able to get 160- 170BHP and reliabilty if done right. At the end of the day the more BHP the more engine trouble.

Whats the spec of your modified sprint?

Ian

[dailysprinter]

Pretty extensive, I'll try to list.
Suspension front springs 225Lb, rear 175Lb and gas adjustable seat shocks and polly bushes
Salisbury LSD
Ford Sierra front brakes
Compmotive 13" 6J alloys with Yokahamas

Engine full rebuild with +40 pistons using cross drilled crank from early engine,uprated oil pump, uprated clutch, fully balanced but not lightened as its a road car. Facet pump in the boot too
Cam group 2 292, vernier, uprated valve springs and bronze guides
Head ported and polished with matched inlet manifold and twin 45 dellortoes.
For extra cooling there is a pipe from the back of the head going back into the heater pipework, it seems to take the hottest water fom the head back to the pump. It was an original fitment on the original TR7 Sprints

Probably forgotten something, but its rapid and I've done some good 600 mile trips up to london in the past, anly done 5000 miles since rebuild.

I have'nt had her running in a while but will in 2007, just don't always seem to have the time.