Forged Piston to use with Godzilla!

HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
Sheldon said:
11.8!!! qazna lostja tlifta din! i think its the first stock ENGINE that made this time in malta eh!? and 11.8 with dahna as a driver or hussey? btw how the fuck did he done 11.8 and trap speed was 110 only?
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mela dahna was driving.. he managed that as his 60ft was a 1.72 :p lol really impressed us lol..

& yes its the 1st stock engine as far as we know... even manty couldnt believe it lol .. bloody crazy lol :rockon:

as for spec im afraid till i get go ahead i cant share :)

kon
 
Sheldon

Sheldon

Malta Area Rep.
HYBRID said:
mela dahna was driving.. he managed that as his 60ft was a 1.72 :p lol really impressed us lol..

& yes its the 1st stock engine as far as we know... even manty couldnt believe it lol .. bloody crazy lol :rockon:

as for spec im afraid till i get go ahead i cant share :)

kon
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if the same specs as he told me (manafx qallix kollox lol) its an impressive time for the mods..
 
KrissyB

KrissyB

Member +
Off topic but just an apology to anyone that I may have offended during this thread.

accept my apologies

Kris:) nothing intentional.
 
nexia201

nexia201

Member +
HYBRID said:
ps Congrats Yet again to Dahna for going even lower today 11.8ET at 110mph & a 60ft 1.72 .. same settings as yesterday on an internally stock engine ;) (never been opened)

Kon
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well done to dahna for that time but to say a standard engine without opening it is a guess as for doing it with under 20psi of boost is the biggest bullshit i have ever heard everybody knows it wouldnt be able to produce all that power with under 20psi ! arent other starlets with modded heads running over 30psi to run in the 11's? you should know better than that Kon . I have to yet see to believe! On the other hand i tought mine was modded because of its performance and only confirmed its not when i had to open the engin so unless you open it and confirm its standard you cant just guess it is. We all know in Malta they run a near full race engine but when you ask what yuv got they all say air filter and silencer so sorry i find it hard to believe the numbers there! Im not saying he didnt do that time which is a very good time im just saying its not done with stage 1 mods as is trying to be said.
 
munday

munday

Member +
Gtstu said:
so would a rod in a 5e exceed the piston speed? due to the extra length?
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What people mean is that for one rotation of the engine the piston has to travel a further distance due to the incresed stroke, so at 7000rpm the pistons in the 5e are moving much faster than in the 4e. Revis is what tends to kill rods as the forces exerted when the piston accelerates or decelerates are highest.
 
KrissyB

KrissyB

Member +
munday said:
What people mean is that for one rotation of the engine the piston has to travel a further distance due to the incresed stroke, so at 7000rpm the pistons in the 5e are moving much faster than in the 4e. Revis is what tends to kill rods as the forces exerted when the piston accelerates or decelerates are highest.
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can someone possibly do the maths on this and find out the exact difference
 
munday

munday

Member +
KrissyB said:
can someone possibly do the maths on this and find out the exact difference
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DIY you lazy sod :p

Do you know the length of the stroke of both engines? Once you have these its pretty simple maths using whatever rpms you choose :beer:
 
Starlet_Sam

Starlet_Sam

Moderator, Regional Area Reps Supervisor & Gay Car
Ok so lets say you want to find the piston distance for 7200rpm.

Firstly the distance I have found for the 4e piston stroke is 77.4mm and for the 5e I got 87mm.

Multiply this by 2 to get the distance per rev, up stroke and down stroke, and you get
154.8mm for the 4e and 174mm for the 5e.

Multiply this by the number of revs, 7200 in this case, and you get 1114560mm for the 4e and 1252800mm for the 5e.

This converts into 3,656.69 feet per minute for the 4e and 4,110.24 feet per minute for the 5e.

This converts to an average mph (average because the pistons have to slow down, stop and then change direction) of 41.55mph for the 4e and 46.71mph for the 5e.
 
munday

munday

Member +
Starlet_Sam said:
Ok so lets say you want to find the piston distance for 7200rpm.

Firstly the distance I have found for the 4e piston stroke is 77.4mm and for the 5e I got 87mm.

Multiply this by 2 to get the distance per rev, up stroke and down stroke, and you get
154.8mm for the 4e and 174mm for the 5e.

Multiply this by the number of revs, 7200 in this case, and you get 1114560mm for the 4e and 1252800mm for the 5e.

This converts into 3,656.69 feet per minute for the 4e and 4,110.24 feet per minute for the 5e.

This converts to an average mph (average because the pistons have to slow down, stop and then change direction) of 41.55mph for the 4e and 46.71mph for the 5e.
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Assuming those stroke lengths are correct, 7200rpm on a 5e is equivalent to 8100rpm in a 4e (roughly)

:drive:
 
Starlet_Sam

Starlet_Sam

Moderator, Regional Area Reps Supervisor & Gay Car
For the piston yes, for the rods no. You must also remember that that is also for the speeds and not the subsequent forces that will be put on the parts as I imagine they will increase logorithmically rather than arithmetically.
 
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