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Search found 496 matches

by daimlersteve
Sat Dec 31, 2022 4:01 am
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: Cam,s and Head Gaskets
Replies: 23
Views: 2198

Re: Cam,s and Head Gaskets

108 sep. is good . Inlet installed at 106.5 deg. You can lose some more exh. duration. 8deg less than Inlet is good ( exh. is too big as org. and is lazy ) 35MM header pipes off the head then stepping up . What's your cfm and velocity on the 31mm at the flange port. It tapers down to the turn ? Jag ...
by daimlersteve
Sat Dec 31, 2022 12:27 am
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: the hidden core plug
Replies: 8
Views: 507

Re: the hidden core plug

Hi all, I've just replaced the plug above the oil filter. A 300 mm long 16mm bolt with a kink in it to expand the little bugga . The large center plug is at the rear of the camshaft ( oil only ) the other two water are slightly lower. Check the gaskets on the blanking plates on the heads at the rear...
by daimlersteve
Thu Dec 29, 2022 8:20 pm
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: Cam,s and Head Gaskets
Replies: 23
Views: 2198

Re: Cam,s and Head Gaskets

What lobe center seperation were you thinking of ? the org cam size and profile c/l allows little material to play with . Hardening thickness is variable and reducing the base circle is not a good look . Theres no easy way to put a modern profile . Tighter lobe centers, Assymetrical profile ,shorter...
by daimlersteve
Thu Nov 17, 2022 10:30 am
Forum: Technical Articles including Wilf Stephens' SP250 Articles
Topic: V8 Cylinder Head Autopsy
Replies: 9
Views: 1767

Re: V8 Cylinder Head Autopsy

The exhaust port is way too big to start with . Its lazy With a bit of lateral thinking the port can be made to flow (with a 11/4" valve ) as much as gas flowed std. port but with a 35% reduction in port volume. Gets a bit techo but its down to ft./sec . plenty of books out there to study . Big...
by daimlersteve
Thu Oct 13, 2022 4:00 am
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: SP250 rear brake disc
Replies: 2
Views: 329

Re: SP250 rear brake disc

True , but why bother when the correct one can be bought
by daimlersteve
Thu Aug 25, 2022 11:45 pm
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: SP250 B Spec Wire wheel and Rear Hub Puller!
Replies: 13
Views: 917

Re: SP250 B Spec Wire wheel and Rear Hub Puller!

Just a Slide Hammer to get them out of the housing , then a press
by daimlersteve
Mon Aug 15, 2022 9:38 pm
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: SP and 250 cylinder heads
Replies: 6
Views: 435

Re: SP and 250 cylinder heads

Hi all , just read the link on Roberts Website , excellent breakdown on the differences. Re the spigot diameter -- Smaller for the auto trans -- Years ago An owner (now deceased ) had assembled a saloon replacement engine and discovered that very problem . This is True !! Dave had the engine set upr...
by daimlersteve
Mon Aug 15, 2022 8:13 am
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: SP and 250 cylinder heads
Replies: 6
Views: 435

Re: SP and 250 cylinder heads

There were however various rocker designs throughout the production. The casting hole plugs at each end are identified as being SP by the two holes in the plug. Later versions were peened over frost plugs .
Steve
by daimlersteve
Tue Jul 26, 2022 10:46 am
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: SP250 gearbox advice
Replies: 10
Views: 723

Re: SP250 gearbox advice

Hi all, the std, Sierra Cosworth b/w t5 has 2.95 to 0.80 .Any taller than .8 will be lugging the poor little fella, 150 ft lb aint a lot of tq. The Toyota w57 is a tad short in 5th @0.86 and the w58 a tad tall to my thinking. Quaifs c/r gear set has 2.73 first if i recall correctly and some others h...
by daimlersteve
Mon Jul 25, 2022 10:43 pm
Forum: Daimler SP250/251, 2.5 V8 & V8-250 Saloon Forum
Topic: SP250 gearbox advice
Replies: 10
Views: 723

Re: SP250 gearbox advice

the close ratio versions have a tallll 1st , not practical for street use