Fabioo
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« on: April 26, 2023, 10:54:34 AM »
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Hello, i have an AJQ Engine with bent rod and decided to do 2.0 Stroker with Forget internals for more powa. Came up with an idea to make post and get some advices from ppl that done such things. The car: Audi A3 8L 1.8T Quattro 1999yr. Power plan is around 500hp. Actually got: - Stock 180hp AJQ Engine. - BPJ 2.0 TFSI Crank - BPJ 2.0 TFSI Pistons - 2.0 TFSI PRISM Rifle Drilled Rods 144mm pin 20mm My questions are: 1. Will CR:8.5 be ok to be around 500hp? with PB98 Fuel. 2. What turbo i should use (actually got K04-064) (Street Car). 3. Is my BPJ 2.0 TFSI Setup good for that engine ? its 06A Block so does BPJ engine is EA113. 4. I will send Pistons to machine shop and they will make room for 3rd valve and also mill pistons for less cr. Thanks  |
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aef
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« Reply #1 on: April 27, 2023, 02:15:08 AM »
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A k04-064 will produce 350hp on a port injected 1.8t
you can use the BPJ Block with 20v head if available
8.5 is fine
i run a stroked 1.8t with tfsi crank and k04-064 style hybrid with 400hp
in your case, when only the rod is bend i would just swap rods and thats it.
the stroker is not worth the money
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Fabioo
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« Reply #2 on: April 27, 2023, 03:01:20 AM »
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Thanks for info, about the turbo k04 i was using it and bent rod, so i think ill do stroker and also switch turbo for bigger thats why stroker is important i guess.
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Fabioo
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« Reply #3 on: May 01, 2023, 09:17:06 AM »
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Ok regarding the set-up i think its good for 500hp+- except turbo but thats obvious.
Wondering if BPJ Pistons with one "+" under it will work for 500+ anyone?
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prj
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« Reply #4 on: May 02, 2023, 02:27:03 AM »
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On 98 RON for port injected 500hp you need 8.0 CR or lower than that,
If you are using WMI or ethanol then 8.5:1 is ok for that power.
Otherwise for 98 RON, you're going to be done at 400hp at that CR, after that you will hit a brick wall with EGT and late timing on 98 RON.
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Fabioo
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« Reply #5 on: May 03, 2023, 04:56:30 AM »
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On 98 RON for port injected 500hp you need 8.0 CR or lower than that,
If you are using WMI or ethanol then 8.5:1 is ok for that power.
Otherwise for 98 RON, you're going to be done at 400hp at that CR, after that you will hit a brick wall with EGT and late timing on 98 RON.
Hey, thanks for reply, good to know i was wondering that cr 8.5 may be too high for pb98 and 500km. How about 2.0 TFSI Pistons, will they hold up 500km? i am thinking about stock 2.0TFSI 20mm PIN pistons but Brand New Mahle. What do You think. |
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prj
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« Reply #6 on: May 03, 2023, 05:55:20 AM »
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No idea.
If you're building the engine I'd just buy forged pistons, and also get the right CR too.
Don't worry about CR also, lower is always better, except for fuel consumption on normal driving.
500hp 1.8T does nothing off boost anyway...
Also, make sure you upgrade the valves and springs, so you can rev higher.
If you just do the springs and valves you can easily go 8000 rpm on hydrolifters and with this amount of power it will be very useful, especially in 1st and 2nd gear.
Otherwise most likely 1st gear to 2nd shift will be impossible without massive lag, even with flatshift.
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« Last Edit: May 03, 2023, 05:58:33 AM by prj »
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Fabioo
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« Reply #7 on: May 03, 2023, 06:22:03 AM »
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No idea.
If you're building the engine I'd just buy forged pistons, and also get the right CR too.
Don't worry about CR also, lower is always better, except for fuel consumption on normal driving.
500hp 1.8T does nothing off boost anyway...
Also, make sure you upgrade the valves and springs, so you can rev higher.
If you just do the springs and valves you can easily go 8000 rpm on hydrolifters and with this amount of power it will be very useful, especially in 1st and 2nd gear.
Otherwise most likely 1st gear to 2nd shift will be impossible without massive lag, even with flatshift.
Thanks for quick reply! The catch is that it will be typical Street Car, maybe even everyday use, friends don't recommend forged pistons to everyday drive. 8000rpm good advice! |
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prj
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« Reply #8 on: May 03, 2023, 06:55:45 AM »
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500hp on this engine is not a street car. It's a drag race only or autobahn car.
It is much slower than the same car with 400hp on the street.
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fknbrkn
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mk4 1.8T AUM
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« Reply #9 on: May 03, 2023, 08:18:37 AM »
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Stay with 064 - its a good option for a daily drive
500hp absolutely useless as a street car dueto massive lag
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Fabioo
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« Reply #10 on: May 03, 2023, 08:42:22 AM »
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500hp on this engine is not a street car. It's a drag race only or autobahn car.
It is much slower than the same car with 400hp on the street.
Yea i know but maybe ill find a Turbo which spools good and will be around 450+ *Garrett Powermax* maybe, 500km is just Theoretical question that engine should last. Stay with 064 - its a good option for a daily drive
500hp absolutely useless as a street car dueto massive lag
Gonna drive on that 064 for sure after i assemble the engine. I think i am gonna go with New Mahle Pistons (20mm pin as well) as well for this project instead used BPJ one's. |
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prj
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« Reply #11 on: May 04, 2023, 02:40:15 AM »
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Yea i know but maybe ill find a Turbo which spools good and will be around 450+ *Garrett Powermax* maybe, 500km is just Theoretical question that engine should last.
Gonna drive on that 064 for sure after i assemble the engine. I don't think so. Anything over 400 is pushing it on that engine. FSI is different because you can use scavenging to improve the spool significantly. But even EA888 with 500hp is quite laggy. Mostly relies on DSG hiding the lag. |
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Fabioo
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« Reply #12 on: June 02, 2023, 03:20:46 PM »
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Topic update: Got few things in road to 500hp - Custom Wiseco Pistons 2.0tfsi (20mm pins) for 1.8t engine with 8.5cr - K2 Rods 144mm (20mm pins) - 2.0 TFSI BPJ Crankshaft EA113 - Engine Block bored for 2.0tfsi crankshaft - Large Port AEB Cylinderhead - ADR n/a Camshaft Intake+Exhaust - Supertech Exhaust valves +1 - RS4 2.7biturbo FCP Valve springs Next steps DSG and no idea for Turbo maybe G25-660 or G30-660 Am i going in right direction?  Anything more i should take care of? |
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prj
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« Reply #13 on: June 02, 2023, 04:41:27 PM »
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I am not sure why you are asking anyone about anything here, since you do it differently anyway.
So just build it, finish it, then realize during tuning that it's not going to work on pump fuel with that high CR, and you end up with a 400hp engine with massive lag or drop a valve due to too high egt.
Better set the fuel system up for ethanol directly if you're going to use those pistons.
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Fabioo
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« Reply #14 on: June 03, 2023, 01:00:07 AM »
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I am not sure why you are asking anyone about anything here, since you do it differently anyway.
So just build it, finish it, then realize during tuning that it's not going to work on pump fuel with that high CR, and you end up with a 400hp engine with massive lag or drop a valve due to too high egt.
Better set the fuel system up for ethanol directly if you're going to use those pistons.
I dont want ethanol in my car and no access to it, i can modify pistons to lower cr like 8.0 should i do that then ? Or use plate ? |
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