Engine questions

[espeed]

Hi all any of you able to help clarify if this engine is anything special or just stock with some bolt on goodies

.. i picked up a spare engine at the weekend, it supposedly had big valve head, forged pistons etc etc..
Ok .. question 1 , although it does look like the ports have been opened up now i have the head off the valves look about standard.. anyone happen to know what the standard 1.9 inlet and exhaust sizes are ? (on this the ins are 42 outs 37)

Question 2, the pistons are domed .. id expected flat with pockets or dished. they are stamped 95.44 on top (2000 slight overbore?) , not taken them out of the block yet to investigate further but wonderred if domed pistons were standard on any model? . Havent been able to find any examples of domed CIH pistons on a cursory surf of the interweb and the only place i find a mention is along the lines of dont use domed pistons in a competition engine.

It was allegedly running twin 48's and producing 210 bhp but that seems a little unlikely if the valves are indeed stock? .

any thoughts ?

[Paul]

anyone happen to know what the standard 1.9 inlet and exhaust sizes are ? (on this the ins are 42 outs 37)

Standard 1.9 valves were 40 mm inlet and 34 mm exhaust

[espeed]

Thanks Paul

[Killer Texas GT]

domed pistons increase the compression thus more horse power depending on the cam, exhaust, ect. The domed pistons are not stock but a performance item. So with forty eights on it (more likely 45s) yes it would be feasible to see 210 HP with it, or a little under 200 HP.

[GTJIM]

Is it a 1.9L block or a 2.0L - the numbers cast on the side of the block will indicate which it is.

42In/37Ex are standard 2.0L valve sizes, easily fitted to the earlier 1.9L head and 95.55mm is +020" on a 2.0L bore but 2.5mm bigger than the 1.9L bore - another easy change to, esentially, make the 1.9L block into a 2.0L motor.

Pop-up pistons show that the motor has had something done to it as only flat-tops and dished pistons were used stock.

I doubt that a motor of that size (just over 2.0L) and with those valves can make 200+ HP ... 150HP is more realistic (depending upon cam and carbs).

[espeed]

Hi .. the block is a 1.9 , cam is a kent OP254 which as far as i can see was the rally/race model , solid lifters .. so again looks like some work done, just seems strange that they didnt increase the valve size at the same time ? . I'll drop one of the pistons out tomorrow and see if i can figure out what they are. Thanks for the info thus far

[tekenaar]

Is it a 1.9L block or a 2.0L - the numbers cast on the side of the block will indicate which it is.
42In/37Ex are standard 2.0L valve sizes and 95.55mm is +020" on a 2.0L bore.
Pop-up pistons show that the motor has had something done to it as only flat-tops and dished pistons were used stock.
I doubt that a motor of that size (just over 2.0L) and with those valves can make 200+ HP ... 150HP is more realistic (depending upon cam and carbs).

Hi .. the block is a 1.9 , cam is a kent OP254 which as far as i can see was the rally/race model , solid lifters .. so again looks like some work done, just seems strange that they didnt increase the valve size at the same time ? . I'll drop one of the pistons out tomorrow and see if i can figure out what they are. Thanks for the info thus far

. . . and now, for those interested in Opel cam specs . . . and for our German friends, just click on the small German flag at the top (Rüdiger Cortez's Opel site).