97 replies to this topic

[Danthefestaman]

I was told that the engine came from an old T-reg clubman im sure he said it was a- series not a+. I would replace the oil pump any way so that is a bonus haha!

So much to learn good job ive got plenty of time!

Who else has had a 1098 on here? What kind of set up and performance was achieved?

[twrminisport]

Most of the stuff for a 998 can be followed really,
I had an 1100 in our Austin Healey which was a nice torquey motor

Just remember, the 998 likes to rev whereas the 1100 likes to grunt. :)

Jesus

[twrminisport]

Loads of 12g202 heads around though, because they were used for the 1100 Austin's and MG's
Especially the AH Sprite and Midget's....

Quite possible to have ended up with one on there, weirder things came out of BL
But do check :)

If i was building an 1100 i would probably...
Rebore and pistons +20/40 or something
12g202 head (if that is what you have in the garage) with some porting work and deshrouding around the combustion chambers (Read Vizard)
I would put an ACD RT (AC Dodd Road Torque) Cam in there
Twin HS2 carbs
Inlet manifold to match head
Centre oil pick up
Centre main strap.
Maniflow manifold
RC40 Exhaust

Don't lighten the flywheel - better to have a bit of weight there for 1100 torque

This should make a nice power figure, pull like a train and not put a bomb hole in your wallet and be nice and reliable.

Jesus

[twrminisport]

Mmm true, doesn't stop someone putting one on afterwards though.
I really wouldn't be surprised if he does have a 202 head on there

Jesus

[morley]

I used to have a 12G202 head on my old 1098!

[oltonlad]

all mini 1098 engines have the 12G202 head as standard, its one of the best heads to modify and second only to the 12G295, i've just finished porting my 202 head for my fast road 1098 engine that i'm building.

[Algordo1100]

Erm, Clubbies where fitted with the 1098 from 1975 where they not?

Al

[oltonlad]

all mini 1098 engines have the 12G202 head as standard, its one of the best heads to modify and second only to the 12G295, i've just finished porting my 202 head for my fast road 1098 engine that i'm building.

No they DON'T..........

The mini didn't get the 1098 engine until 1979 when it was fitted to the Mini 1100 Special................ like I said above the 12G202 wasn't still in production then.

please do not shout at me......especially when you have got your facts completely wrong!!!


i probably know more about mini's now than you ever will..............ok!!

Edited by oltonlad, 12 March 2012 - 12:02 PM.

[oltonlad]

all mini 1098 engines have the 12G202 head as standard, its one of the best heads to modify and second only to the 12G295, i've just finished porting my 202 head for my fast road 1098 engine that i'm building.

No they DON'T..........

The mini didn't get the 1098 engine until 1979 when it was fitted to the Mini 1100 Special................ like I said above the 12G202 wasn't still in production then.

please do not shout at me......especially when you have got your facts completely wrong!!!


i probably know more about mini's now than you ever will..............ok!!

anyway, what makes you so sure that the 202 heads were discontinued?
the austin 1100 had them and so did the allegro 1100 and the allegro 1100's ran from around 1972-1980, before those it was the austin 1100's which ran from the early 60's to 1974 and then the mini clubmans were fitted with 1100 engines from 1975 (all with 202 heads)
although it isn't impossible to aquire 202 cylinder heads they are reasonably difficult to obtain, now that the 295 heads are getting rare (and rediculously priced when they do come up for sale) the 202 are the heads that people try to get now because they have massive scope for modification, theres only 1mm difference between the inlet valve of a 295 head and the 202 head, the exhaust valves are the same size for both heads.

[oltonlad]

Well for a start in case you didn't know with your extensive knowledge, the Austin 1100 (ADO16) wasn't a mini. Neither was the Allegro..............

i know that, i'm just pointing out that the 202 heads continued in production on other cars after the 997 cooper (which you said was the ONLY mini to have the 202 head fitted as standard)
after the 997 cooper, the 202 head was used on mini 1100 clubmans from 1975 (which you also said that they never) when BL used them in these cars instead of the 998 engine (the only 998 clubman available was the automatic)
the mini 1100 special was the last mini to use the 1098 engine with the 202 head as by then the mini clubman had been replaced in estate form by the mini HL which had the 998 engine.
the last of the 1098 engines fitted in the 1100 specials also had A+ cylinder blocks and these engines were discontinued in 1980 when the mini special finished production.

[Danthefestaman]

calm down fella, it is definately at 202 and i dont give a rats ass where it came from or why its there! Just want to build a goo engine and have fun like i used to when i had my first mini.

So i havent done alot to the engine but im greatfull for all the feed back and its all being taken in. Today i have been and collected the 998 engine and gearbox and the chap gave me all the spares you could ever imagine. It included a set of flat top pistons and a duplex timing chain. Havent sorted it all out yet but some good bits there.

So which engine is the best to use a 998 or 1098?? I like the idea of a 1098 as not many use them!
Also he said the flat top pistons came over the top of the block face when he tried them is this due to the stroke of the engine?

Good news is that i have earnt even more engine credit with my local engine shop so i could get most of the machining done for cheap!

Keep the help coming and lets keep it civil !!!!!!

[oltonlad]

calm down fella, it is definately at 202 and i dont give a rats ass where it came from or why its there! Just want to build a goo engine and have fun like i used to when i had my first mini.

So i havent done alot to the engine but im greatfull for all the feed back and its all being taken in. Today i have been and collected the 998 engine and gearbox and the chap gave me all the spares you could ever imagine. It included a set of flat top pistons and a duplex timing chain. Havent sorted it all out yet but some good bits there.

So which engine is the best to use a 998 or 1098?? I like the idea of a 1098 as not many use them!
Also he said the flat top pistons came over the top of the block face when he tried them is this due to the stroke of the engine?

Good news is that i have earnt even more engine credit with my local engine shop so i could get most of the machining done for cheap!

Keep the help coming and lets keep it civil !!!!!!

i've done a 1098 build with a 12G295 head, kent 266 cam, kent VS2 double valve springs etc, and the car was rolling road tuned 2 weeks ago with 60bhp@the wheels, it will rev cleanly to 6000rpm and above and i was told by the rolling road operator that all this stuff about 1098 engines not revving is a load of rubbish, the engine in my car drops off cam at 6300 and will give 1275 engined mini's a damn good run for their money too!

the only reason that the pistons would come over the top of the block face is if you used 998 pistons with a 1098 crank.

Edited by oltonlad, 04 June 2012 - 10:30 PM.

[Danthefestaman]

Quite possibly what they are from! What is the benifit of flat top pistons?

Well as it goes i have a shed load of bits and will have to sort through it all. I think then i will assembly a complete engine and then strip it back down and go from there!

How does it drive with the 1098? Does it pull from low down and can you hold it in gears better and than a 998?

Well im looking to retain the 202 head if i can and build a reasonable price engine that is fun.

[oltonlad]

heres how it drives (this video was before it was rolling road tuned, its much quicker now)

[Danthefestaman]

thats a great vid and love the cars name!

Whats the idea of using straight cut drop gears? Ive seen a lot of people using them. Is it a cheaper way of getting the straight cut box noise or is there a reason?

What kind of speeds does it manage?

When im back at work i will look at the collection of bits i have, the most important bit is i have two complete engines now!

So is the difference in performance noticeable between the 1098 and 998?