taittsierra

wat does everybody reckon is the better engine??

lead_foot

iTrader: (1)

In what context?

Power per cost?

Avalibilty of parts?

All out power?

Torque band?

.....ect

stevieturbo

I'm not a fan of Cossie engines...but the SR20 sure aint shit hot !

At least you can rev a cossie without fear of the valvetrain falling apart.

taittsierra

everything in genral

lead_foot

iTrader: (1)

SR20's tend the make less torque on the same turbo and same boost as a YB.

SR20 bit's are cheaper.

OrionRST200bhp

iTrader: (1)

Cossie YB all day long

timrud

C20LET is a better engine IMO than both those

cossieDavedree

in standard form not a chance.

timrud

Why not?

It is created from one of the greatest N/A engines ever, which is still stongly used today.

Its way more reliable, and parts are lots cheaper.

And its a piece of pish to get big power from them. And again cheaper than a YB.

timrud

Also I believe misfire was a word created after going out in a YB car

RST

iTrader: (3)

Sr20 Det!!!! One of our company cars running 388 BHP. Totally standard engine. Gets thrashed every where. 1/4 miles etc... never misses a beat. Try that with a 80,000 mile cossie lump

cossieDavedree

why not cos in standard form the rods are weak on a c20let.
compared to a cossie everything there for potentially more power than a c20let.

Cossie has steel rods, stronger crank, under piston spray jets and just as cheap to tune as a c20 let. they are also cheaper to build once the power is raised over 350 and more parts are available for the cossie than the c20let.

reliability is irrelevant as age is the main factor now, a cosworth block can range from the early 86-205 pinto block. to the small turbo cosworth block. the yb is getting on now

, advantage a c20let has is that the boost doesnt have to be capped at low rpm as much as a stndard yb head,
c20 let doesnt suffer from bore wear like the yb does.

try and run a c20 let on standard internals ie rods above 330/350 lb torque, depending on boost
Not saying the c20let isn't a good engine it is.. but for na the duratec is far superior once again. the c20 let is just as unreliable im talking from experience too

cossieDavedree

easily fixed, lack of maintenance and old age ignition system,

all can be easily and cheaply fixed, maintained, or upgraded ie msd coilpack etc

packman

Got a steel crank for the SR20 done less than 3000 miles mint 500 notes or nearest offer. And sure can get some power out of the Sr20 but you only have to look at what Harvey gets out of the YB.

Char1ie

iTrader: (6)

It's all about the car. Cossie engine makes sense in a Ford of any era. SR20DET makes sense in a Datsun or other Jap car. SR20DET is a very pretty engine when its sitting in a Datsun:




Charlie

RSTsteve

what about the 3S-GTE found in the MR2's?

some say its an over engineered engine for its duties?

stevieturbo

and others say they blow head gaskets like fuck, and split liners like fuck.


Just look at the water trails up the strip at every event MR2's or GT4's take part in lol

jammerrs

char1ie love that bottom pic, datsun 240z?

the cossie engine is by far the nicest looking of all engines, regardless of if it technically better

id say cosworth out of those 2 is better though

SiZT

+1

ajamesc

The yb is a 20 odd year old engine that is still pushing the boundaries of what a 4cylinder turbo engine can do! I dont think u can realy compare any other 4cylinder turbo engine to it when 500bhp is the norm and poeple like mark sheed are able to get over 800bhp! In all fairness even the jap 6 cylinders can struggle to compare with them to a certain degree!

cossiecrew

having had both i say cossie allday long im just starting a yb build myself but it will be going in something non ford and as far as im aware its never been done before so thats all i will say until its built

WongRS

iTrader: (11)

2 of my mates have pulsar gtir's (they are sr20;s, right?)
in the 4 years ive owned my cossie its blown up 0 times, pulsars, 6 times between them IIRC.

Rs1

iTrader: (1)

Sack them both off in favour of an evo engine.

cossiecrew

SWR

Depends a bit... a "4 cyl turbo engine" not to ignore is a Volvo redblock fitted with a 16V head and a turbo. 2.5 strokers are way over 1000 hp now... But the YB is no bad engine, neither so the SR20DET, built both.

vroooom ptssssh

IMO the SR20 DET is the better lump

It's all alloy
has VVT
chain driven
cheaper to buy parts for generally
all come with piston oil squirts (not all cossie blocks did)

I've got one in my 200sx currently running 355@wheels on 1.4 bar with standard internals other than a set of JE's, std cams and rods, makes peak power at 7500 and can rev to 8 comfortably, has previously run 2bar at 420@wheels with a fucked head gasket which was leaking between all 4 cylinders, and had fairly bad valve leakage at the time.

ajamesc

Alloy blocks are week and thats the good thing about the yb its simple and will not get anywear near as good bhp or torque from a sr20 and is the 420 on a rolling road or a hub dyno?

scoooby slayer

iTrader: (4)

hows that exactly ? if an rb26dett or a 2jz-gte engine had the same level of tuning over years and years by a top tuner it would be well in excess of 1000 bhp. 500 hp is not the norm for a yb it takes some work and ŁŁŁŁ to get it genuineley with matching torque, but it is the norm with either of the jap engines and easily achieved. i know this thread is aimed at the sr20det but youve stated the jap 6s struggle to compare, believe me they dont i know ive had both yb and rb

vroooom ptssssh

what are the weakness's of this engines block???
It doesnt need machined for long stud conversions, and has shown no sign of weakness the whole time its been built, So I see no problem with it tbh..

Why wont a 2.0 4 cyl 16V engine not get the same bhp/torque as another 2.0 4 cyl 16V engine for the same revs/boost?? I dont see your logic in that one.

The power was on a rolling road, and was 420 at the wheels.


p.s. how the hell can you say a straight 6 cylinder engine isnt as good as a straight 4 cylinder, thats just nonsense!

ajamesc

it costs about 12000 to get 500 on a skyline at abby about the same for a yb without the managment and theres a few skylines out there with over a 1000 now mate dont get me wronge i love skylines they are the ultimate when u start getting over 650bhp but not that much better then a genuine 500bhp yb below Rod tarry was faster than rocket ronnie over 1.5 miles with a lot less power so shows u can compare the too

ajamesc

Read the post i dident say it was better i said u can compear it to it! And cast iron blocks are stronger than alloy and did i say the sr20 had a week block no! I havent herd of many sr20s running around with over 650bhp!

cossieDavedree

what cossie blocks didnt come with piston sprayers ??
2wd and 4x4 used the pipe from the oil pump, and escort cosworth t25 used oil spray jets that run off the main oil gallery?

scoooby slayer

iTrader: (4)

as far as i know ronnies car wasnt built specific for top speed rods is. everywhere apart from at brunters ie 1/4, track ronnie would have won. rod would have to race a top speed built skyline like the lemon he wouldnt win then mate. the lemon is being rebuilt now at rk tuning i think, its been sat at trs yard for a while i have a pic somewhere of my car on the ramp with the lemon sat next to it

ajamesc

Yeah i agree with u but ronnie was still dam fast to 100 and 150 so shows rods was as fast in gear to be faster at the end just saying i know the yb isent better than the skyline engine and dident say that just to a point u can compear

vroooom ptssssh

Ok yea iron is stronger than alloy, but what proof do you have that an ally SR20 block for example is 'weak' other than the material it's made from being softer than cast iron?

Im sure if a cosworth can get 650bhp, an SR20 can get it...why wouldnt it be able too? it's a 2.0, 4 cyl, 16v engine....theres no magic involved mate



Yep i beg your pardon they do, and I know the T25 has them from the main oil gallery, hence "not all". I think the main oil gallery jets are better than the spray bar, they dont quite hit right under the piston crown iirc.

ajamesc

As i say i dident say it was maybe u should try putting a genuine 500 plus through it to see! And no its not magic but dose take a lot of development and cost to make it stay togther

cossieDavedree

no probs fella, was 99% sure they did. as the t25 also had revised oilways etc.
a query what was the nissan engine that is a 2.0litre straight 6 ?? used in the skyline?

vroooom ptssssh

Well once I start running 2-2.2 bar again i'll let you know! 'should' be making 450@wheels, not quite 500 but maybe if I add some cams and let it rev higher we might see 500 as it has all the other parts to get there.

As with any engine, iron, ally or whatever, it's all about costs and development, 500bhp doesnt come as easy as everyone seems to think.

Arent F1 engines Alloy?

ajamesc

but f1 engines have to last less than 1000 miles and yep 500 dosent come cheep lol ive spent around 12 grand and thats without the other bits that go with it ie cooling breather gearbox diff clutch brakes suspension managment

vroooom ptssssh

Yea, they have to last a race....so if ally was a weak choice, it wouldnt get used!

Got a thread with your spec?